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.service.ts

@@ -0,0 +1,49 @@
+import { Injectable } from '@nestjs/common'
+import { ResponseMapper } from '../../common/response/response-mapper'
+import { PrismaService } from '../../prisma/prisma.service'
+
+@Injectable()
+export class SalesInvoicesService {
+  constructor(private prisma: PrismaService) {}
+
+  // async create(dto: CreateSalesInvoiceDto) {
+  //   const payload: any = { ...dto }
+  //   if (Object.prototype.hasOwnProperty.call(payload, 'customerId')) {
+  //     payload.customer = { connect: { id: Number(payload.customerId) } }
+  //     delete payload.customerId
+  //   }
+
+  //   const item = await this.prisma.salesInvoice.create({ data: payload })
+  //   return ResponseMapper.create(item)
+  // }
+
+  async findAll() {
+    const items = await this.prisma.salesInvoice.findMany({ include: { customer: true } })
+    return ResponseMapper.list(items)
+  }
+
+  async findOne(id: number) {
+    const item = await this.prisma.salesInvoice.findUnique({
+      where: { id },
+      include: { items: true, customer: true },
+    })
+    if (!item) return null
+    return ResponseMapper.single(item)
+  }
+
+  // async update(id: number, data: any) {
+  //   const payload: any = { ...data }
+  //   if (Object.prototype.hasOwnProperty.call(payload, 'customerId')) {
+  //     if (payload.customerId === null) payload.customer = { disconnect: true }
+  //     else payload.customer = { connect: { id: Number(payload.customerId) } }
+  //     delete payload.customerId
+  //   }
+  //   const item = await this.prisma.salesInvoice.update({ where: { id }, data: payload })
+  //   return ResponseMapper.update(item)
+  // }
+
+  async remove(id: number) {
+    const item = await this.prisma.salesInvoice.delete({ where: { id } })
+    return ResponseMapper.single(item)
+  }
+}