feat: update validation and exception handling, refactor controller routes, and enhance sales invoice item DTO

- Removed global validation pipe and added a new ValidationExceptionFilter for better error handling.
- Refactored controller routes to use underscores instead of hyphens for consistency.
- Updated CreateSalesInvoiceItemDto to include new fields: quantity, unit_type, and payload.
- Modified CreateSalesInvoiceDto to enforce items as an array with a minimum size.
- Added Enums module to provide gold karat values through a dedicated endpoint.
- Introduced new columns in the database schema for sales invoice items and goods.

src/modules/enums/enums.service.ts

@@ -0,0 +1,17 @@
+import { Injectable } from '@nestjs/common'
+import { GoldKarat } from '../../common/enums/enums'
+import { ResponseMapper } from '../../common/response/response-mapper'
+
+@Injectable()
+export class EnumsService {
+  getAllEnums() {
+    return {
+      GoldKarat: Object.values(GoldKarat).filter(value => typeof value === 'string'),
+    }
+  }
+
+  getEnumValues(enumName: string) {
+    const enums = this.getAllEnums()
+    return ResponseMapper.list(enums[enumName] || [])
+  }
+}