Add validators and services for Product Galleries and Product Tags

- Implemented Create, Delete, Get, and Update validators for Product Galleries.
- Added Create, Delete, Get, and Update validators for Product Tags.
- Created service classes for handling Discount Categories, Discount Orders, Discount Products, Discount Shopping Cart, Product Categories, Product Galleries, and Product Tags.
- Each service class integrates with CQRS for command and query handling.
- Established mapping profiles for Product Galleries.

src/CMSMicroservice.Application/WalletCQ/Commands/VerifyDiscountWalletCharge/VerifyDiscountWalletChargeCommandHandler.cs

@@ -87,7 +87,7 @@ public class VerifyDiscountWalletChargeCommandHandler
             );
 
             // 4. ثبت Transaction
-            var transaction = new Transactions
+            var transaction = new Transaction
             {
                 Amount = request.Amount,
                 Description = $"شارژ کیف پول تخفیفی - کاربر {user.Id}",
@@ -97,7 +97,7 @@ public class VerifyDiscountWalletChargeCommandHandler
                 Type = TransactionType.DiscountWalletCharge
             };
 
-            _context.Transactionss.Add(transaction);
+            _context.Transactions.Add(transaction);
             await _context.SaveChangesAsync(cancellationToken);
 
             _logger.LogInformation(