Enhance sales document flow with new service and related functionalities

- Introduced `SalesDocumentFlowService` to manage the lifecycle of sales documents, including packing slips and invoices.
- Implemented methods for processing orders, generating invoices, and handling packing slips based on order status.
- Updated `SalesOrdersService`, `PackingSlipsService`, and `SalesInvoicesService` to integrate with the new document flow service.
- Added new methods for marking drafts processed and checking if invoices are on sales plans.
- Enhanced existing services and repositories to support new functionalities, including status transitions and related document management.
- Updated DTOs to include new fields for packing slip and invoice IDs in sales order responses.
- Added unit tests for the new service and updated existing tests to cover new functionalities.

src/modules/sales/packing-slips/dto/packing-slip.dto.ts

@@ -168,6 +168,13 @@ export class UpdatePackingSlipStatusDto {
   @ApiProperty({ enum: PACKING_SLIP_STATUSES })
   @IsIn([...PACKING_SLIP_STATUSES])
   status!: string;
+
+  @ApiPropertyOptional({ type: [SalesLineDto] })
+  @IsOptional()
+  @IsArray()
+  @ValidateNested({ each: true })
+  @Type(() => SalesLineDto)
+  products?: SalesLineDto[];
 }
 
 export class BulkIdsDto {