fix(tutorial): complete click targets from UI events

Runtime/Trigger/ShrinkTutorialAnchor.cs

@@ -1,12 +1,20 @@
+using System;
 using UnityEngine;
+using UnityEngine.EventSystems;
 
 namespace ShrinkTutorial
 {
-    public class ShrinkTutorialAnchor : MonoBehaviour
+    public class ShrinkTutorialAnchor : MonoBehaviour, IPointerClickHandler
     {
         [SerializeField] private string anchorId = string.Empty;
 
         public string AnchorId => anchorId;
+        public event Action<PointerEventData> Clicked;
+
+        public void OnPointerClick(PointerEventData eventData)
+        {
+            Clicked?.Invoke(eventData);
+        }
 
         public void SetAnchorId(string value)
         {