Initial Flutter-Projekt-Setup (AP0)

Grundgerüst für die Emergency-App: Flutter-Projekt für Android/iOS,
Kern-Packages (url_launcher, geolocator, geocoding, permission_handler,
provider, shared_preferences, intl), Ordnerstruktur laut docs/plan.md
und l10n-Grundgerüst.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

ios/Runner/AppDelegate.swift

@@ -0,0 +1,16 @@
+import Flutter
+import UIKit
+
+@main
+@objc class AppDelegate: FlutterAppDelegate, FlutterImplicitEngineDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+
+  func didInitializeImplicitFlutterEngine(_ engineBridge: FlutterImplicitEngineBridge) {
+    GeneratedPluginRegistrant.register(with: engineBridge.pluginRegistry)
+  }
+}