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/field/plans/plans.service.spec.ts

@@ -36,7 +36,10 @@ describe('PlansService', () => {
   const employeesService = { findById: jest.fn() };
   const branchesService = { findById: jest.fn() };
   const customersService = { findById: jest.fn() };
-  const salesInvoicesService = { findById: jest.fn() };
+  const salesInvoicesService = {
+    findById: jest.fn(),
+    markDraftsProcessed: jest.fn(),
+  };
   const packingSlipsService = { findById: jest.fn() };
   const privilegesService = { checkPermission: jest.fn() };