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.

frontend/src/i18n/locales/en/falukant.json

@@ -30,6 +30,17 @@
             "knowledge": "Knowledge",
             "hire": "Hire",
             "noProposals": "No director candidates available."
+        },
+        "branch": {
+            "vehicles": {
+                "cargo_cart": "Cargo cart",
+                "ox_cart": "Ox cart",
+                "small_carriage": "Small horse carriage",
+                "large_carriage": "Large horse carriage",
+                "four_horse_carriage": "Four-horse carriage",
+                "raft": "Raft",
+                "sailing_ship": "Sailing ship"
+            }
         }
     }
 }