* Add bulk selection UI
* Handle bulk selection with Stimulus controller instead of session
* Update tests
* Remove stale routes
* Remove old system test helper methods
An overhaul and cleanup of the transactions feature including:
- Simplification of transactions search and filtering
- Consolidation of account sync logic after transaction change
- Split sidebar modal and modal into "drawer" and "modal" concepts
- Refactor of transaction partials and folder organization
- Cleanup turbo frames and streams for transaction updates, including new Transactions::RowsController for inline updates
- Refactored and added several integration and systems tests
