[iPad] Fixes automatically pausing + resuming emulation with Stage Manager on iOS 16 beta 5

We use DeltaCore’s new UIWindow subclass GameWindow in SceneDelegate to fix issues that were introduced with iOS 16 beta 5.

Also removes touchControllerSkin.layoutGuide = self.view.safeAreaLayoutGuide assignment which no longer compiles due to TouchControllerSkin refactoring.

Cores/DeltaCore

@@ -1 +1 @@
-Subproject commit 90aa403e229ea1993fad455b41cc8c9ceb9da46a
+Subproject commit 6a7a856a14739a9700f4121ca95d65d49744faf0

Delta/Emulation/GameViewController.swift

@@ -663,7 +663,6 @@ private extension GameViewController
         else if let controllerSkin = DeltaCore.ControllerSkin.standardControllerSkin(for: game.type), controllerSkin.hasTouchScreen(for: traits)
         {
             var touchControllerSkin = TouchControllerSkin(controllerSkin: controllerSkin)
-            touchControllerSkin.layoutGuide = self.view.safeAreaLayoutGuide
             
             if self.view.bounds.width > self.view.bounds.height
             {

Delta/SceneDelegate.swift

@@ -14,7 +14,20 @@ import Harmony
 @objc(SceneDelegate) @available(iOS 13, *)
 class SceneDelegate: UIResponder, UIWindowSceneDelegate
 {
-    var window: UIWindow?
+    var window: UIWindow? {
+        get {
+            if _window == nil
+            {
+                _window = GameWindow()
+            }
+            
+            return _window
+        }
+        set {
+            _window = newValue as? GameWindow
+        }
+    }
+    private var _window: GameWindow?
     
     private let deepLinkController = DeepLinkController()
     
@@ -35,6 +48,8 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate
         {
             self.handle(.shortcut(shortcutItem))
         }
+        
+        self.window?.makeKeyAndVisible()
     }
     
     func sceneDidDisconnect(_ scene: UIScene)