Added TrackedProperty for commiting and reverting values

Toolkit.Foundation/TrackedProperty.cs

@@ -0,0 +1,10 @@
+namespace Toolkit.Foundation;
+
+public class TrackedProperty<T>(T initial,
+    Action<T> revert,
+    Func<T> commit)
+{
+    public void Commit() => initial = commit();
+
+    public void Revert() => revert(initial);
+}