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-api/src/modules/train-crew/train-crew.module.ts

@@ -0,0 +1,14 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+
+import { TrainCrewMember } from './entities/train-crew-member.entity';
+import { TrainCrewController } from './train-crew.controller';
+import { TrainCrewService } from './train-crew.service';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([TrainCrewMember])],
+  providers: [TrainCrewService],
+  controllers: [TrainCrewController],
+  exports: [TrainCrewService],
+})
+export class TrainCrewModule {}