[UserFeatureRequest] Questions overview pane

In longer surveys, going back to edit an answer can be cumbersome. Respectively, reality in the field may require to do geolocation last or first. Having a questions overview pane that can slide in from the left or right in order to go back to a previous question or ahead to a particular question could facilitate this.

Or sliding back on the bottom progress bar, akin to chapters in Youtube videos?

Worth discussing.

Partially related to https://github.com/google/ground-android/issues/3221
(--> overview pane could have a "Save progress" button or something)

@andreia-ferreira @kenstershiro @gino-m @vittorino