feat: add DTOs and services for tax switch integration

- Created SendBulkSaleInvoicesDto for handling bulk sale invoice requests.
- Implemented TaxSwitchSendPayloadDto and related DTOs for tax switch item payloads and results.
- Developed SalesInvoiceTaxSwitchService to manage tax switch operations, including sending and retrieving tax information.
- Added SalesInvoiceTaxService for handling sales invoice tax logic, including bulk sending and persistence of results.
- Introduced NamaTaxSwitchAdapter to interact with the tax switch service, simulating external API responses.
- Created SendBulkSalesInvoicesDto for POS module to handle bulk sales invoice requests.

src/modules/pos/sales-invoices/dto/create-sales-invoice.dto.ts

@@ -1,6 +1,7 @@
 import { ApiProperty, PartialType } from '@nestjs/swagger'
 import {
   ArrayMinSize,
+  IsBoolean,
   IsDateString,
   IsEnum,
   IsNumber,
@@ -42,6 +43,11 @@ export class CreateSalesInvoiceDto {
   @IsString()
   notes?: string
 
+  @ApiProperty({ required: false, default: false })
+  @IsOptional()
+  @IsBoolean()
+  send_to_tax?: boolean
+
   @ApiProperty({ required: true, default: CustomerType.UNKNOWN })
   @IsEnum(CustomerType)
   customer_type: CustomerType