Add XML doc to new public interfaces

Author: stephenquan

src/Controls/src/Core/Interactivity/IAttachedObject.cs

@@ -1,9 +1,27 @@
 #nullable disable
 namespace Microsoft.Maui.Controls
 {
+
+	/// <summary>
+	/// Defines a contract for objects that can be attached to a <see cref="BindableObject"/>.
+	/// This interface is typically implemented by behaviors or effects that need to interact with
+	/// the lifecycle or properties of a visual element in the UI.
+	/// </summary>
 	public interface IAttachedObject
 	{
+
+		/// <summary>
+		/// Attaches the object to the specified <see cref="BindableObject"/>.
+		/// This method is called when the object is added to the visual tree.
+		/// </summary>
+		/// <param name="bindable">The <see cref="BindableObject"/> to attach to.</param>
 		void AttachTo(BindableObject bindable);
+
+		/// <summary>
+		/// Detaches the object from the specified <see cref="BindableObject"/>.
+		/// This method is called when the object is removed from the visual tree.
+		/// </summary>
+		/// <param name="bindable">The <see cref="BindableObject"/> to detach from.</param>
 		void DetachFrom(BindableObject bindable);
 	}
 }

src/Controls/src/Core/Interactivity/IBehavior.cs

@@ -3,10 +3,19 @@
 
 namespace Microsoft.Maui.Controls
 {
+
+	/// <summary>
+	/// Represents a behavior that can be attached to a <see cref="BindableObject"/>.
+	/// </summary>
 	public interface IBehavior : INotifyPropertyChanged, IAttachedObject
 	{
 	}
 
+	/// <summary>
+	/// Represents a behavior that can be attached to a specific type of <see cref="BindableObject"/>.
+	/// This generic interface allows behaviors to be strongly typed to the target element.
+	/// </summary>
+	/// <typeparam name="T">The type of <see cref="BindableObject"/> the behavior can attach to.</typeparam>
 	public interface IBehavior<T> : IBehavior where T : BindableObject
 	{
 	}