Added height screen for registration & set adequate options and initial parameters for height/weight

lib/presentation/height_screen/models/height_model.dart

@@ -0,0 +1,21 @@
+// ignore_for_file: must_be_immutable
+
+import 'package:equatable/equatable.dart';
+import 'package:eatvio_app/data/models/selectionPopupModel/selection_popup_model.dart';
+
+/// This class defines the variables used in the [height_screen],
+/// and is typically used to hold data that is passed between different parts of the application.
+class HeightModel extends Equatable {
+  HeightModel({this.dropdownItemList = const []}) {}
+
+  List<SelectionPopupModel> dropdownItemList;
+
+  HeightModel copyWith({List<SelectionPopupModel>? dropdownItemList}) {
+    return HeightModel(
+      dropdownItemList: dropdownItemList ?? this.dropdownItemList,
+    );
+  }
+
+  @override
+  List<Object?> get props => [dropdownItemList];
+}