add items order

lib/domain/order/repositories/i_order_repository.dart

@@ -20,4 +20,9 @@ abstract class IOrderRepository {
     required OrderRequest request,
     required String paymentMethodId,
   });
+
+  Future<Either<OrderFailure, Order>> addItemOrder({
+    required String id,
+    required List<AddItemOrderRequest> request,
+  });
 }