Add vehicle management features in Falukant

- Introduced vehicle types and transport management in the backend, including new models and associations for vehicles and transports.
- Implemented service methods to retrieve vehicle types and handle vehicle purchases, ensuring user validation and transaction management.
- Updated the FalukantController and router to expose new endpoints for fetching vehicle types and buying vehicles.
- Enhanced the frontend with a new transport tab in BranchView, allowing users to buy vehicles, and added localization for vehicle-related terms.
- Included initialization logic for vehicle types in the database setup.

backend/routers/falukantRouter.js

@@ -69,6 +69,8 @@ router.post('/politics/elections', falukantController.vote);
 router.get('/politics/open', falukantController.getOpenPolitics);
 router.post('/politics/open', falukantController.applyForElections);
 router.get('/cities', falukantController.getRegions);
+router.get('/vehicles/types', falukantController.getVehicleTypes);
+router.post('/vehicles', falukantController.buyVehicles);
 router.get('/underground/types', falukantController.getUndergroundTypes);
 router.get('/notifications', falukantController.getNotifications);
 router.get('/notifications/all', falukantController.getAllNotifications);