Implemented structure for push Notifications

lib/storage/base/settings.dart

@@ -5,6 +5,7 @@ import '../file/fileSettings.dart';
 import '../fileView/fileViewSettings.dart';
 import '../gradeAverages/gradeAveragesSettings.dart';
 import '../holidays/holidaysSettings.dart';
+import '../notification/notificationSettings.dart';
 import '../talk/talkSettings.dart';
 import '../timetable/timetableSettings.dart';
 
@@ -25,6 +26,7 @@ class Settings {
   FileSettings fileSettings;
   HolidaysSettings holidaysSettings;
   FileViewSettings fileViewSettings;
+  NotificationSettings notificationSettings;
 
   Settings({
     required this.appTheme,
@@ -35,6 +37,7 @@ class Settings {
     required this.fileSettings,
     required this.holidaysSettings,
     required this.fileViewSettings,
+    required this.notificationSettings,
   });
 
   static String _themeToJson(ThemeMode m) => m.name;