Fügt grundlegendes Routing mit Routemaster hinzu und ersetzt MyApp-Struktur

lib/Pages/Dashboard/dashboard.dart

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+import 'package:flutter/material.dart';
+
+class Dashboard extends StatelessWidget {
+  @override
+  Widget build(final BuildContext context) => const Text('DASHBOARD');
+}

lib/Pages/Settings/settings.dart

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+import 'package:flutter/material.dart';
+
+class Settings extends StatelessWidget {
+  @override
+  Widget build(final BuildContext context) => const Text('SETTINGS');
+}

lib/Pages/Trend/trend.dart

@@ -0,0 +1,6 @@
+import 'package:flutter/material.dart';
+
+class Trend extends StatelessWidget {
+  @override
+  Widget build(final BuildContext context) => const Text('TREND');
+}

lib/Pages/home_page.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+import 'package:routemaster/routemaster.dart';
+
+class HomePage extends StatelessWidget {
+  @override
+  Widget build(final BuildContext context) {
+    final TabPageState tabPage = TabPage.of(context);
+
+    return Scaffold(
+      appBar: AppBar(
+        bottom: TabBar(
+          controller: tabPage.controller,
+          tabs: const <Widget>[
+            Tab(text: 'Dashboard'),
+            Tab(text: 'Verlauf'),
+            Tab(text: 'Einstellungen'),
+          ],
+        ),
+      ),
+      body: TabBarView(
+        controller: tabPage.controller,
+        children: <Widget>[
+          for (final PageStack stack in tabPage.stacks)
+            PageStackNavigator(stack: stack),
+        ],
+      ),
+    );
+  }
+}