add notification

filcnaplo/lib/helpers/notification_helper.i18n.dart

@@ -0,0 +1,24 @@
+import 'package:i18n_extension/i18n_extension.dart';
+
+extension Localization on String {
+  static final _t = Translations.byLocale("hu_hu") +
+      {
+        "en_en": {
+          "title": "New grade",
+          "body": "You got a %s in %s"
+        },
+        "hu_hu": {
+          "title": "Új jegy",
+          "body": "%s-st kaptál %s tantárgyból"
+        },
+        "de_de": {
+          "title": "Neue Note",
+          "body": "Du hast eine %s in %s"
+        },
+      };
+
+  String get i18n => localize(this, _t);
+  String fill(List<Object> params) => localizeFill(this, params);
+  String plural(int value) => localizePlural(value, this, _t);
+  String version(Object modifier) => localizeVersion(modifier, this, _t);
+}