fix!: Window.Visible setter should not be public (#12177)

BREAKING CHANGE: The property is read-only in UWP/WinUI

GitHub Issue (If applicable): Part of #8339

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build/PackageDiffIgnore.xml

@@ -9598,6 +9598,8 @@
 			<Member fullName="Windows.UI.Xaml.Controls.VirtualizingPanelLayout/Line Windows.UI.Xaml.Controls.VirtualizingPanelLayout.CreateLine(Windows.UI.Xaml.Controls.Primitives.GeneratorDirection fillDirection, System.Int32 extentOffset, System.Int32 breadthOffset, System.Int32 availableBreadth, AndroidX.RecyclerView.Widget.RecyclerView/Recycler recycler, AndroidX.RecyclerView.Widget.RecyclerView/State state, Uno.UI.IndexPath nextVisibleItem, System.Boolean isNewGroup)" reason="Api alignments" />
 			<Member fullName="System.Nullable`1&lt;Uno.UI.IndexPath&gt; Windows.UI.Xaml.Controls.VirtualizingPanelLayout.GetDynamicSeedIndex(System.Nullable`1&lt;Uno.UI.IndexPath&gt; firstVisibleItem, System.Int32 availableBreadth)" reason="Api alignments" />
 			<Member fullName="System.String Uno.UI.Services.ResourcesService.Get(System.String id)" reason="Api alignments" />
+
+			<Member fullName="System.Void Windows.UI.Xaml.Window.set_Visible(System.Boolean value)" reason="Does not exist in UWP and WinUI" />
 		</Methods>
 	</IgnoreSet>
 

src/Uno.UI/UI/Xaml/Window.cs

@@ -188,7 +188,7 @@ public UIElement Content
 		public bool Visible
 		{
 			get => CoreWindow.Visible;
-			set => CoreWindow.Visible = value;
+			private set => CoreWindow.Visible = value;
 		}
 
 		/// <summary>