feat: Add AppWindowPresenter

src/Uno.UWP/Generated/3.0.0.0/Microsoft.UI.Windowing/AppWindowPresenter.cs

@@ -3,17 +3,17 @@
 #pragma warning disable 114 // new keyword hiding
 namespace Microsoft.UI.Windowing
 {
-#if __ANDROID__ || __IOS__ || IS_UNIT_TESTS || __WASM__ || __SKIA__ || __NETSTD_REFERENCE__ || __MACOS__
+#if false
 	[global::Uno.NotImplemented]
 #endif
 	public partial class AppWindowPresenter
 	{
-#if __ANDROID__ || __IOS__ || IS_UNIT_TESTS || __WASM__ || __SKIA__ || __NETSTD_REFERENCE__ || __MACOS__
+#if false
 		internal AppWindowPresenter()
 		{
 		}
 #endif
-#if __ANDROID__ || __IOS__ || IS_UNIT_TESTS || __WASM__ || __SKIA__ || __NETSTD_REFERENCE__ || __MACOS__
+#if false
 		[global::Uno.NotImplemented("__ANDROID__", "__IOS__", "IS_UNIT_TESTS", "__WASM__", "__SKIA__", "__NETSTD_REFERENCE__", "__MACOS__")]
 		public global::Microsoft.UI.Windowing.AppWindowPresenterKind Kind
 		{

src/Uno.UWP/Microsoft/UI/Windowing/AppWindowClosingEventArgs.cs

@@ -1,5 +1,8 @@
 namespace Microsoft.UI.Windowing;
 
+/// <summary>
+/// Provides data for the AppWindow.Closing event.
+/// </summary>
 #if HAS_UNO_WINUI
 public
 #else
@@ -11,5 +14,8 @@ internal AppWindowClosingEventArgs()
 	{
 	}
 
+	/// <summary>
+	/// Gets or sets a value that indicates whether the event should be canceled.
+	/// </summary>
 	public bool Cancel { get; set; }
 }

src/Uno.UWP/Microsoft/UI/Windowing/AppWindowPresenter.cs

@@ -0,0 +1,14 @@
+namespace Microsoft.UI.Windowing;
+
+public partial class AppWindowPresenter
+{
+	/// <summary>
+	/// Displays an app window using a pre-defined configuration appropriate for the type of window.
+	/// </summary>
+	internal AppWindowPresenter(AppWindowPresenterKind kind) => Kind = kind;
+
+	/// <summary>
+	/// Gets a value that indicates the kind of presenter the app window is using.
+	/// </summary>
+	public AppWindowPresenterKind Kind { get; }
+}