feat(train-crew): implement train crew management module

- Added DTOs for creating, querying, and updating train crew members.
- Created entity for train crew members with relevant fields and enums for role, nationality, and status.
- Developed service for handling CRUD operations and ensuring no duplicate crew members.
- Implemented controller to manage API endpoints for train crew operations.
- Integrated permissions for viewing, creating, updating, and deleting train crew members.
- Added frontend components for displaying, adding, editing, and deleting train crew members.
- Established API service for interacting with the train crew backend.
- Updated routing and sidebar to include train crew management section.

apps/edr-freight-web/backoffice/src/App.tsx

@@ -67,6 +67,7 @@ import WagonPerformanceDetailPage from "./pages/wagon-performance/WagonPerforman
 import WagonTransfersPage from "./pages/wagons/WagonTransfersPage";
 import VehicleDetailPage from "./pages/fleet/VehicleDetailPage";
 import DriverDetailPage from "./pages/fleet/DriverDetailPage";
+import TrainCrewPage from "./pages/train-crew/TrainCrewPage";
 import RoutesPage from "./pages/fleet/RoutesPage";
 import FuelPurchasePage from "./pages/fleet/FuelPurchasePage";
 import FuelStatsPage from "./pages/fleet/FuelStatsPage";
@@ -1016,6 +1017,14 @@ const App = () => {
             </RequirePermission>
           }
         />
+        <Route
+          path="train-crew"
+          element={
+            <RequirePermission permission={FREIGHT_PERMS.trainCrew.view}>
+              <TrainCrewPage />
+            </RequirePermission>
+          }
+        />
         <Route
           path="fuel-purchases"
           element={