maint: added livewatch asset

Assets/Plugins/LiveWatchLite/TowerDefenceDemo/Scripts/Tower/LaserEffect.cs

@@ -0,0 +1,33 @@
+using System.Collections;
+using UnityEngine;
+
+namespace Ingvar.LiveWatch.TowerDefenceDemo
+{
+    public class LaserEffect : MonoBehaviour
+    {
+        [SerializeField] private float _duration = 0.05f;
+        [SerializeField] private GameObject _laserBeam;
+        
+        public void Play(Vector3 target)
+        {
+            target += Vector3.up * 0.5f;
+                
+            var dist = (target - transform.position).magnitude;
+            transform.LookAt(target);
+            _laserBeam.transform.localScale = new Vector3(
+                _laserBeam.transform.localScale.x,
+                _laserBeam.transform.localScale.y,
+                dist/2f);
+            
+            StopAllCoroutines();
+            StartCoroutine(ShowAndHide());
+        }
+
+        private IEnumerator ShowAndHide()
+        {
+            _laserBeam.SetActive(true);
+            yield return new WaitForSeconds(_duration);
+            _laserBeam.SetActive(false);
+        }
+    }
+}