Created a new Profile section, added new styles, made some layouts for user profile screen

lib/presentation/registration/language_select_screen/models/language_select_model.dart

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+// ignore_for_file: must_be_immutable
+
+import 'package:equatable/equatable.dart';
+import 'package:eatvio_app/data/models/userRegistrationModel/user_registration_model.dart';
+import 'package:eatvio_app/data/models/selectionPopupModel/selection_popup_model.dart';
+
+/// This class defines the variables used in the [language_select_screen],
+/// and is typically used to hold data that is passed between different parts of the application.
+class LanguageSelectModel extends Equatable {
+  LanguageSelectModel({this.dropdownItemList = const []});
+  UserRegistrationSheet userRegistrationSheet = UserRegistrationSheet(
+    name: '',
+    firstName: '',
+    lastName: '',
+    email: '',
+    password: '',
+    passwordConfirmation: '',
+    termsAccepted: 'accepted',
+    birthdate: DateTime.now().toString(),
+    gender: '',
+    country: '',
+    city: '',
+    lang: '',
+    weight: '',
+    height: '',
+    chestCircumference: '',
+    waistCircumference: '',
+    hipCircumference: '',
+    bloodPressureUp: '',
+    bloodPressureDown: '',
+    hasHypo: '',
+    hasHyper: '',
+    aboutAllergy: '',
+    aboutTakingPils: '',
+    aboutSportHobbies: '',
+    favoriteFoods: '',
+    unfavoriteFoods: '',
+    additionalInfo: '',
+  );
+  List<SelectionPopupModel> dropdownItemList;
+
+  LanguageSelectModel copyWith({List<SelectionPopupModel>? dropdownItemList}) {
+    return LanguageSelectModel(
+      dropdownItemList: dropdownItemList ?? this.dropdownItemList,
+    );
+  }
+
+  @override
+  List<Object?> get props => [dropdownItemList];
+}