feature(updater): Implement auto-updating system using AppCast protocol

lib/main.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 
 import 'package:flutter/material.dart';
 import 'package:moonwell_launcher/app/mw_app.dart';
+import 'package:moonwell_launcher/features/launcher/data/launcher_update_service.dart';
 import 'package:moonwell_launcher/service_container.dart';
 import 'package:window_manager/window_manager.dart';
 
@@ -10,6 +11,9 @@ Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await windowManager.ensureInitialized();
 
+  await configureDependencies(env: 'flutter');
+  final launcherUpdateService = getIt<LauncherUpdateService>();
+
   WindowOptions windowOptions = WindowOptions(
     size: Size(960, 540),
     center: true,
@@ -22,10 +26,9 @@ Future<void> main() async {
     windowManager.waitUntilReadyToShow(windowOptions, () async {
       await windowManager.show();
       await windowManager.focus();
+      await launcherUpdateService.checkForUpdates();
     }),
   );
 
-  await configureDependencies(env: 'flutter');
-
   runApp(const MoonWellApp());
 }