Feat: Fügt localization für Deutsch hinzu

lib/main.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:routemaster/routemaster.dart';
 
 import 'Services/navigation_service.dart';
@@ -16,6 +17,15 @@ void main() {
       ),
       routeInformationParser: const RoutemasterParser(),
 
+      localizationsDelegates: const [
+        GlobalMaterialLocalizations.delegate,
+        GlobalWidgetsLocalizations.delegate,
+        GlobalCupertinoLocalizations.delegate,
+      ],
+      supportedLocales: const [
+        Locale('de'),
+      ],
+
       title: 'DragonLedger 🐉📒',
       theme: ThemeService.getLightTheme(),
       darkTheme: ThemeService.getDarkTheme(),