Fix animation behavior hot reload (#2288)

* Add missing setter for AnimateCommand

Fix https://developercommunity.visualstudio.com/t/Hot-reload-stops-working-when-using-Comm/10707756

Control properties should have both a getter and setter
so that Hot Reload (and C# code) can update them.
AnimateCommand was missing the setter - likely just
an oversight. Hot Reload now works with this change.

* Add comment clarifying that apps shouldn't use the setter directly.

* Attempt to make thr setter as  obsolete

* Update AnimationBehavior.shared.cs

* Update AnimationBehavior.shared.cs

---------

Co-authored-by: Shaun Lawrence <[email protected]>

src/CommunityToolkit.Maui/Behaviors/AnimationBehavior.shared.cs

@@ -24,11 +24,27 @@ public class AnimationBehavior : EventToCommandBehavior
 
 	/// <summary>
 	/// Gets the Command that allows the triggering of the animation.
+	/// 
+	/// NOTE: Apps should not directly set this property, treating it as read only. The setter is only public because
+	/// that's currently needed to make XAML Hot Reload work. Instead, apps should provide a value for this OneWayToSource
+	/// property by creating a binding, in XAML or C#. If done via C# use code like this:
+	/// <c>behavior.SetBinding(AnimationBehavior.AnimateCommandProperty, nameof(ViewModel.TriggerAnimationCommand));</c>
 	/// </summary>
 	/// <remarks>
 	/// <see cref="AnimateCommand"/> has a <see cref="Type"/> of Command&lt;CancellationToken&gt; which requires a <see cref="CancellationToken"/> as a CommandParameter. See <see cref="Command{CancellationToken}"/> and <see cref="System.Windows.Input.ICommand.Execute(object)"/> for more information on passing a <see cref="CancellationToken"/> into <see cref="Command{T}"/> as a CommandParameter"
 	/// </remarks>
-	public Command<CancellationToken> AnimateCommand => (Command<CancellationToken>)GetValue(AnimateCommandProperty);
+	public Command<CancellationToken> AnimateCommand {
+		get => (Command<CancellationToken>)GetValue(AnimateCommandProperty);
+      [Obsolete(
+"""
+Do not use this setter, it only exists to enable XAML Hot reload support in your IDE.
+
+Instead, apps should provide a value for this OneWayToSource property by creating a binding, in XAML or C#. If done via C# use code like this:
+
+behavior.SetBinding(AnimationBehavior.AnimateCommandProperty, nameof(ViewModel.TriggerAnimationCommand));
+""")]
+		set => SetValue(AnimateCommandProperty, value);
+	}
 
 	/// <summary>
 	/// The type of animation to perform.