feat: implement POS order management system

- Added CreateOrderDto and CreateOrderItemDto for order creation.
- Developed PosOrdersController to handle order-related endpoints.
- Created PosOrdersService for business logic related to orders.
- Implemented PosOrdersWorkflow for order processing workflows.
- Established Prisma integration for database operations in orders.
- Introduced SalesInvoicesModule and related DTOs for sales invoice management.
- Enhanced SalesInvoicesService and SalesInvoicesWorkflow for invoice processing.

src/modules/sales-invoices/sales-invoices.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common'
+import { PrismaModule } from '../../prisma/prisma.module'
+import { SalesInvoicesController } from './sales-invoices.controller'
+import { SalesInvoicesService } from './sales-invoices.service'
+import { SalesInvoicesWorkflow } from './sales-invoices.workflow'
+
+@Module({
+  imports: [PrismaModule],
+  controllers: [SalesInvoicesController],
+  providers: [SalesInvoicesService, SalesInvoicesWorkflow],
+  exports: [SalesInvoicesWorkflow],
+})
+export class SalesInvoicesModule {}