feat: Internally implement TextAdapter

src/Uno.UI/DirectUI/TextAdapter.cs

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See LICENSE in the project root for license information.
+// MUX Reference TextAdapter_Partial.cpp, tag winui3/release/1.5-stable
+
+using Microsoft.UI.Xaml.Controls;
+
+namespace Uno.UI.DirectUI;
+
+internal class TextAdapter
+{
+	public TextBlock Owner { get; }
+
+	public TextAdapter(TextBlock owner)
+	{
+		Owner = owner;
+	}
+}