- Removed `AbteilungViewModel`, `BewerbAnlegenViewModel`, `BewerbViewModel`, and `CreateBewerbWizardScreen`.
- Cleaned up related imports and unused domain models.
- Added `reiter-feature` module for managing riders, including list and detail views.
- Implemented `MsMasterDetailLayout` for ReiterScreen, integrating `MsDataTable`, `MsFilterBar`, and `MsActionToolbar`.
- Defined domain models (`Reiter`, `LizenzKlasse`, `Sparte`, `ReiterStatus`) with mock data support.
- Updated roadmap to reflect progress in Phase 5: Routing & Screen-Komposition.
- Registered the new module in `settings.gradle.kts`.
Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>