added about dialog

app/lib/core/routing/routes.dart

@@ -1,3 +1,5 @@
+import 'package:bang_navigator/core/routing/dialog_page.dart';
+import 'package:bang_navigator/features/about/presentation/screens/about.dart';
 import 'package:bang_navigator/features/search_browser/presentation/screens/browser.dart';
 import 'package:bang_navigator/features/settings/data/repositories/settings_repository.dart';
 import 'package:bang_navigator/features/settings/presentation/screens/settings.dart';
@@ -9,6 +11,11 @@ part 'routes.g.dart';
 
 @TypedGoRoute<KagiRoute>(
   path: '/',
+  routes: [
+    TypedGoRoute<AboutRoute>(
+      path: 'about',
+    ),
+  ],
 )
 class KagiRoute extends GoRouteData {
   KagiRoute();
@@ -41,3 +48,10 @@ class SettingsRoute extends GoRouteData {
     return const SettingsScreen();
   }
 }
+
+class AboutRoute extends GoRouteData {
+  @override
+  Page<void> buildPage(BuildContext context, GoRouterState state) {
+    return DialogPage(builder: (_) => const AboutDialogScreen());
+  }
+}