feat: Add navigation and data entry page

lib/main.dart

@@ -0,0 +1,24 @@
+import 'package:flutter/material.dart';
+import 'package:intl/date_symbol_data_local.dart';
+import 'navigator/view.dart';
+
+void main() {
+  initializeDateFormatting("de_CH", null);
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Demo',
+
+      theme: ThemeData(
+        primarySwatch: Colors.blue,
+      ),
+      home: const SafeArea(child: NavigatorPage()),
+    );
+  }
+}