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.

prisma/schema/enum.prisma

@@ -11,3 +11,17 @@ enum PurchaseReceiptStatus {
   PARTIALLY_PAID
   PAID
 }
+
+enum SalesInvoiceType {
+  GOOD
+  SERVICE
+}
+
+enum UnitType {
+  COUNT
+  GRAM
+  KILOGRAM
+  LITER
+  METER
+  HOUR
+}