added product comparison

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

@@ -66,4 +66,25 @@ class ProductModel {
   String toString() {
     return 'ProductModel(uuid: $uuid, catName: $catName, prodId: $prodId, prodType: $prodType, name: $name, icon: $icon)';
   }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is ProductModel &&
+          runtimeType == other.runtimeType &&
+          uuid == other.uuid &&
+          catName == other.catName &&
+          prodId == other.prodId &&
+          prodType == other.prodType &&
+          name == other.name &&
+          icon == other.icon;
+
+  @override
+  int get hashCode =>
+      uuid.hashCode ^
+      catName.hashCode ^
+      prodId.hashCode ^
+      prodType.hashCode ^
+      name.hashCode ^
+      icon.hashCode;
 }