feat: update demo

samples/iosApp/iosApp/AppDelegate.swift

@@ -0,0 +1,15 @@
+import UIKit
+import shared
+
+@UIApplicationMain
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+    var window: UIWindow?
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+        window = UIWindow(frame: UIScreen.main.bounds)
+        window?.rootViewController = App_iosKt.createUIViewController()
+        window?.makeKeyAndVisible()
+        return true
+    }
+}

samples/iosApp/iosApp/ContentView.swift

@@ -1,19 +0,0 @@
-import UIKit
-import SwiftUI
-import shared
-
-struct ComposeView: UIViewControllerRepresentable {
-    func makeUIViewController(context: Context) -> UIViewController {
-        let viewController = App_iosKt.createUIViewController()
-        return viewController
-    }
-    
-    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {}
-}
-
-struct ContentView: View {
-    var body: some View {
-        ComposeView()
-            .ignoresSafeArea(.all, edges: .bottom) // Compose has own keyboard handler
-    }
-}

samples/iosApp/iosApp/iOSApp.swift

@@ -1,10 +0,0 @@
-import SwiftUI
-
-@main
-struct iOSApp: App {
-	var body: some Scene {
-		WindowGroup {
-			ContentView()
-		}
-	}
-}