Break routes into blueprints or seperate files

All the routes living in the `__init__.py` file is a little rough, we should break the routes out into cleaner files. Either using folder structure like packet or blueprints like conditional

Start by reading the routes currently in __init__.py and inspect the project structure for the patterns referenced as “packet” and “conditional.” Determine whether the project should use separate route files or Flask blueprints, then confirm the selected organization preserves the existing route behavior.

索引モデルが issue の本文から書いたものです。