Implement personal section in navigation: Add a new 'personal' menu item with sub-items for language learning and calendar. Update localization files for English and German to include translations for the new section. Integrate personal routes into the router configuration for navigation.

frontend/src/router/index.js

@@ -8,6 +8,7 @@ import adminRoutes from './adminRoutes';
 import falukantRoutes from './falukantRoutes';
 import blogRoutes from './blogRoutes';
 import minigamesRoutes from './minigamesRoutes';
+import personalRoutes from './personalRoutes';
 
 const routes = [
   {
@@ -22,6 +23,7 @@ const routes = [
   ...falukantRoutes,
   ...blogRoutes,
   ...minigamesRoutes,
+  ...personalRoutes,
 ];
 
 const router = createRouter({