♻️ change describe enum to new dart byName method

Author: iqfareez

lib/providers/ThemeController.dart

@@ -1,6 +1,5 @@
 //adapted from https://gist.github.com/RodBr/4d6ebfea8b1f9432ff088bec4455e15c#file-main4-dart
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:get_storage/get_storage.dart';
 import '../../notificationUtil/prevent_update_notifs.dart';
@@ -12,16 +11,15 @@ class ThemeController with ChangeNotifier {
   set themeMode(ThemeMode? themeMode) {
     PreventUpdatingNotifs.setNow();
     _themeMode = themeMode;
-    GetStorage().write('theme', themeMode.toString().split('.')[1]);
+    GetStorage().write('theme', themeMode.toString().split('.').last);
     notifyListeners();
   }
 
   ThemeController() {
     String themeText =
         GetStorage().read('theme') ?? 'light'; //by default, light is selected
     try {
-      _themeMode =
-          ThemeMode.values.firstWhere((e) => describeEnum(e) == themeText);
+      _themeMode = ThemeMode.values.byName(themeText);
     } catch (e) {
       _themeMode = ThemeMode.system;
     }