initial: standalone repo from monorepo split

src/expense/expense.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { ExpenseController } from './expense.controller';
+import { ExpenseService } from './expense.service';
+import { AccountingModule } from '../accounting/accounting.module';
+import { NotificationModule } from '../notification/notification.module';
+
+@Module({
+  imports: [AccountingModule, NotificationModule],
+  controllers: [ExpenseController],
+  providers: [ExpenseService],
+  exports: [ExpenseService],
+})
+export class ExpenseModule {}