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.

prisma/migrations/20260427163305_init/migration.sql

@@ -0,0 +1,3 @@
+-- AlterTable
+ALTER TABLE `business_activities` ALTER COLUMN `fiscal_id` DROP DEFAULT,
+    ALTER COLUMN `partner_token` DROP DEFAULT;