implement file module and add files relation to booking entity and populate on fetch

apps/edr-freight-api/src/modules/files/files.repository.ts

@@ -0,0 +1,28 @@
+import { BaseRepository } from "@edr/api-common";
+import { Injectable } from "@nestjs/common";
+import { InjectRepository } from "@nestjs/typeorm";
+import { Repository } from "typeorm";
+
+import { FileRecord } from "./entities/file.entity";
+
+@Injectable()
+export class FilesRepository extends BaseRepository<FileRecord> {
+  constructor(
+    @InjectRepository(FileRecord)
+    repository: Repository<FileRecord>,
+  ) {
+    super(repository);
+  }
+
+  findByResource(resourceId: string, resource: string): Promise<FileRecord[]> {
+    return this.repository.find({ where: { resourceId, resource } });
+  }
+
+  findByCode(
+    resourceId: string,
+    resource: string,
+    code: string,
+  ): Promise<FileRecord | null> {
+    return this.repository.findOne({ where: { resourceId, resource, code } });
+  }
+}