add toSelected function to convert from product to selectedProduct

lib/pages/spaces_management/all_spaces/model/product_model.dart

@@ -1,5 +1,7 @@
 import 'package:syncrow_web/utils/constants/assets.dart';
 
+import 'selected_product_model.dart';
+
 class ProductModel {
   final String uuid;
   final String catName;
@@ -38,6 +40,15 @@ class ProductModel {
     };
   }
 
+  SelectedProduct toSelectedProduct(int count) {
+    return SelectedProduct(
+      productId: uuid,
+      count: count,
+      productName: name!,
+      product: this,
+    );
+  }
+
   static String _mapIconToProduct(String prodType) {
     const iconMapping = {
       '1G': Assets.Gang1SwitchIcon,