maint: added livewatch asset

Assets/Plugins/LiveWatchLite/TowerDefenceDemo/Scripts/UI/WaveButtonUI.cs

@@ -0,0 +1,42 @@
+using System;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Ingvar.LiveWatch.TowerDefenceDemo.UI
+{
+    public class WaveButtonUI : MonoBehaviour
+    {
+        [SerializeField] private Button playWaveButton;
+        
+        private LevelScene _levelScene;
+
+        private void Awake()
+        {
+            _levelScene = FindObjectOfType<LevelScene>();
+        }
+
+        private void OnEnable()
+        {
+            _levelScene.LevelStateManager.StateChanged += RefreshButton;
+            playWaveButton.onClick.AddListener(OnPlayButtonClicked);
+
+            RefreshButton();
+        }
+
+        private void OnDisable()
+        {
+            _levelScene.LevelStateManager.StateChanged -= RefreshButton;
+            playWaveButton.onClick.RemoveListener(OnPlayButtonClicked);
+        }
+        
+        private void RefreshButton()
+        {
+            playWaveButton.interactable = _levelScene.LevelStateManager.CurrentState == LevelStateType.Waiting;
+        }
+
+        private void OnPlayButtonClicked()
+        {
+            _levelScene.WaveManager.StartWave();
+        }
+    }
+}