chore: add invoice and subscription entities

src/modules/invoices/repositories/invoices.repository.ts

@@ -0,0 +1,12 @@
+import { Injectable } from "@nestjs/common";
+import { InjectRepository } from "@nestjs/typeorm";
+import { Repository } from "typeorm";
+
+import { Invoice } from "../entities/invoice.entity";
+
+@Injectable()
+export class InvoicesRepository extends Repository<Invoice> {
+  constructor(@InjectRepository(Invoice) invoicesRepository: Repository<Invoice>) {
+    super(invoicesRepository.target, invoicesRepository.manager, invoicesRepository.queryRunner);
+  }
+}