Say which file do not have their imports sorted

**Is your feature request related to a problem? Please describe.**
My project is quite big and has many files. That's the output I get after running `flutter pub run import_sorter:main --exit-if-changed`

```
┏━━ Sorting 165 dart files
┃ ┣━━ Sorted imports for /lib/repos/repository_social.dart/
┃ ┣━━ Sorted imports for /lib/repos/repository_geolocation.dart/
┃ ┣━━ Sorted imports for /lib/repos/repository_assets.dart/
┃ ┣━━ Sorted imports for /lib/repos/repository_user.dart/
┃ ┣━━ Sorted imports for /lib/repos/repository_info.dart/
┃ ┣━━ Sorted imports for /lib/routes.dart/
┃ ┣━━ Sorted imports for /lib/utils.dart/
┃ ┣━━ Sorted imports for /lib/models/track.dart/
┃ ┣━━ Sorted imports for /lib/models/place_distance_user.dart/
┃ ┣━━ Sorted imports for /lib/models/dayroom.dart/
┃ ┣━━ Sorted imports for /lib/models/dayroom_post.dart/
┃ ┣━━ Sorted imports for /lib/models/story.dart/
┃ ┣━━ Sorted imports for /lib/models/place.dart/
┃ ┣━━ Sorted imports for /lib/models/info.dart/
┃ ┣━━ Sorted imports for /lib/models/user_response.dart/
┃ ┣━━ Sorted imports for /lib/models/air_data.dart/
┃ ┣━━ Sorted imports for /lib/models/comment.dart/
┃ ┣━━ Sorted imports for /lib/models/location.dart/
┃ ┣━━ Sorted imports for /lib/models/section.dart/
┃ ┣━━ Sorted imports for /lib/models/like.dart/
┃ ┣━━ Sorted imports for /lib/models/info_login.dart/
┃ ┣━━ Sorted imports for /lib/models/visit.dart/
┃ ┣━━ Sorted imports for /lib/models/datafile.dart/
┃ ┣━━ Sorted imports for /lib/models/place_distance_social.dart/
┃ ┣━━ Sorted imports for /lib/models/models.dart/
┃ ┣━━ Sorted imports for /lib/blocs/login_info_bloc/login_info_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/login_info_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/login_info_bloc/login_info_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/login_info_bloc/login_info_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/bool_bloc/bool_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_bloc/datafile_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_bloc/datafile_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_bloc/datafile_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/comments_bloc/comments_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/comments_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/comments_bloc/comments_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/comments_bloc/comments_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_manage_bloc/datafile_manage_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_manage_bloc/datafile_manage_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_manage_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_manage_bloc/datafile_manage_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/section_bloc/section_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/section_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/section_bloc/section_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/section_bloc/section_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/location_bloc/location_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/location_bloc/location_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/location_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/location_bloc/location_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/likes_bloc/likes_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/likes_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/likes_bloc/likes_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/likes_bloc/likes_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_infos_bloc/datafile_infos_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_infos_bloc/datafile_infos_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_infos_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/datafile_infos_bloc/datafile_infos_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/map_type_bloc/map_type_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/login_bloc/login_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/login_bloc/login_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/login_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/login_bloc/login_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/simple_bloc_observer.dart/
┃ ┣━━ Sorted imports for /lib/blocs/distance_bloc/distance_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/distance_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/distance_bloc/distance_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/distance_bloc/distance_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/info_bloc/info_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/info_bloc/info_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/info_bloc/info_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/info_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/visits_bloc/visits_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/visits_bloc/visits_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/visits_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/visits_bloc/visits_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/home_bloc/home_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/auth_bloc/auth_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/auth_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/auth_bloc/auth_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/auth_bloc/auth_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/sort_mode_bloc/sort_mode_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/air_bloc/air_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/air_bloc/air_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/air_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/air_bloc/air_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/map_bloc/map_bloc.dart/
┃ ┣━━ Sorted imports for /lib/blocs/map_bloc/map_state.dart/
┃ ┣━━ Sorted imports for /lib/blocs/map_bloc/map_event.dart/
┃ ┣━━ Sorted imports for /lib/blocs/map_bloc/bloc.dart/
┃ ┣━━ Sorted imports for /lib/extensions/query_snapshot.dart/
┃ ┣━━ Sorted imports for /lib/extensions/date_time.dart/
┃ ┣━━ Sorted imports for /lib/extensions/sort_mode.dart/
┃ ┣━━ Sorted imports for /lib/extensions/map.dart/
┃ ┣━━ Sorted imports for /lib/extensions/location_permission.dart/
┃ ┣━━ Sorted imports for /lib/extensions/string.dart/
┃ ┣━━ Sorted imports for /lib/extensions/context.dart/
┃ ┣━━ Sorted imports for /lib/extensions/map_type.dart/
┃ ┣━━ Sorted imports for /lib/extensions/color.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/screen_home.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/pages/page_discover.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/pages/page_info.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/pages/page_my_profile.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/widgets/card_dayroom.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/widgets/card_story.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/widgets/card_air_quality.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/widgets/card_feature.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/widgets/card_info.dart/
┃ ┣━━ Sorted imports for /lib/screens/home/widgets/card_section.dart/
┃ ┣━━ Sorted imports for /lib/screens/screen_story.dart/
┃ ┣━━ Sorted imports for /lib/screens/section/modal_sort_mode.dart/
┃ ┣━━ Sorted imports for /lib/screens/section/screen_section.dart/
┃ ┣━━ Sorted imports for /lib/screens/section/widgets/card_place.dart/
┃ ┣━━ Sorted imports for /lib/screens/intro/screen_intro.dart/
┃ ┣━━ Sorted imports for /lib/screens/intro/image_intro.dart/
┃ ┣━━ Sorted imports for /lib/screens/screen_full_photo_network.dart/
┃ ┣━━ Sorted imports for /lib/screens/screen_about.dart/
┃ ┣━━ Sorted imports for /lib/screens/dayroom/screen_dayroom.dart/
┃ ┣━━ Sorted imports for /lib/screens/air/screen_air.dart/
┃ ┣━━ Sorted imports for /lib/screens/air/widgets/air_indicator.dart/
┃ ┣━━ Sorted imports for /lib/screens/map/card_nearby_place.dart/
┃ ┣━━ Sorted imports for /lib/screens/map/screen_map.dart/
┃ ┣━━ Sorted imports for /lib/screens/map/modal_map_type.dart/
┃ ┣━━ Sorted imports for /lib/screens/screen_error.dart/
┃ ┣━━ Sorted imports for /lib/screens/datafiles/row_auth.dart/
┃ ┣━━ Sorted imports for /lib/screens/datafiles/screen_datafiles.dart/
┃ ┣━━ Sorted imports for /lib/screens/datafiles/card_datafile.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/screen_place.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/comment/bottom_sheet_add_comment.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/comment/new_comment_state.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/comment/new_comment_bloc.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/comment/new_comment_event.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/widgets/dialog_user.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/widgets/row_comment.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/widgets/card_place_overview.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/widgets/hero_place_image_file.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/widgets/row_like.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/widgets/row_visit.dart/
┃ ┣━━ Sorted imports for /lib/screens/place/widgets/hero_place_image_network.dart/
┃ ┣━━ Sorted imports for /lib/screens/screen_full_photo_file.dart/
┃ ┣━━ Sorted imports for /lib/screens/login/screen_login.dart/
┃ ┣━━ Sorted imports for /lib/main.dart/
┃ ┣━━ Sorted imports for /lib/generated_plugin_registrant.dart/
┃ ┣━━ Sorted imports for /lib/config.dart/
┃ ┣━━ Sorted imports for /lib/data/app_data_parser.dart/

┗━━🚨
pub finished with exit code 1
```

In the example above, I get error code `1` because imports in `lib/app.dart` are not sorted. I would like to `import_sorter` to explicitly tell me **why** it failed on **which files**. I'm encountering a very strange bug in my GitHub Actions and more information from import_sorter would greatly help me debug it!

**Describe the solution you'd like**
I'd like `import_sorter` to print more information, instead of just exiting with error code 1.

Example:
```
(...)
┃ ┣━━ Sorted imports for /lib/generated_plugin_registrant.dart/
┃ ┣━━ Sorted imports for /lib/config.dart/
┃ ┣━━ Sorted imports for /lib/data/app_data_parser.dart/

┗━━🚨
Imports in `/lib/app.dart` are not sorted!
```

**Describe alternatives you've considered**
I don't know😅