feat(task1): restructure directories for turborepo monorepo

- Move backend/ to apps/server/ via git mv
- Move frontend/ to apps/admin/ via git mv
- Create packages/typescript-config/ with base, nestjs, and react-vite presets

apps/server/src/expenses/expenses.module.ts

@@ -0,0 +1,17 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { RoomExpense } from '../entities/room-expense.entity';
+import { PersonalExpense } from '../entities/personal-expense.entity';
+import { Room } from '../entities/room.entity';
+import { Student } from '../entities/student.entity';
+import { ExpensesService } from './expenses.service';
+import { ExpensesController } from './expenses.controller';
+import { OperationLogsModule } from '../operation-logs/operation-logs.module';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([RoomExpense, PersonalExpense, Room, Student]), OperationLogsModule],
+  controllers: [ExpensesController],
+  providers: [ExpensesService],
+  exports: [ExpensesService],
+})
+export class ExpensesModule {}