feat: support compose multiplatform

samples/iosApp/iosApp/ContentView.swift

@@ -0,0 +1,19 @@
+import UIKit
+import SwiftUI
+import shared
+
+struct ComposeView: UIViewControllerRepresentable {
+    func makeUIViewController(context: Context) -> UIViewController {
+        let viewController = Main_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
+    }
+}