feature(registration): refactor i 2.

lib/data/models/selectionPopupModel/selection_popup_model.dart

@@ -1,15 +1,14 @@
-///SelectionPopupModel is common model
-///used for setting data into dropdowns
-class SelectionPopupModel {
-  int? id;
-  String title;
-  dynamic value;
-  bool isSelected;
+import 'package:freezed_annotation/freezed_annotation.dart';
 
-  SelectionPopupModel({
-    this.id,
-    required this.title,
-    this.value,
-    this.isSelected = false,
-  });
+part 'selection_popup_model.freezed.dart';
+
+@freezed
+class SelectionPopupModel with _$SelectionPopupModel {
+  const factory SelectionPopupModel({
+    int? id,
+    required String title,
+    dynamic value,
+    @Default(false)
+    bool isSelected,
+  }) = _SelectionPopupModel;
 }