ExtensionKit macOS 12.3 to 13.0 API Differences

EXAppExtensionBrowserViewController.h
Added EXAppExtensionBrowserViewController
EXHostViewController.h
Added EXHostViewController
Added EXHostViewController.delegate
Added EXHostViewController.placeholderView
Added -[EXHostViewController makeXPCConnectionWithError:]
Added EXHostViewControllerDelegate
Added -[EXHostViewControllerDelegate hostViewControllerDidActivate:]
Added -[EXHostViewControllerDelegate hostViewControllerWillDeactivate:error:]
Added -[EXHostViewControllerDelegate shouldAcceptXPCConnection:]