Add example app runner for iOS

examples/Host/iOS/ExampleViewController.h

@@ -0,0 +1,19 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+#import "Host/iOS/OpenVulkanoViewController.h"
+
+@interface MainMenuViewController : UIViewController
+@end
+
+@interface ExampleViewController : OpenVulkanoViewController
+@property(nonatomic, strong)OpenVulkanoView* renderView;
+@property size_t exampleId;
+@end