maint: added livewatch asset

Assets/Plugins/LiveWatchLite/TowerDefenceDemo/Scripts/EnergyManager.cs

@@ -0,0 +1,54 @@
+using System;
+using UnityEngine;
+using UnityEngine.Serialization;
+
+namespace Ingvar.LiveWatch.TowerDefenceDemo
+{
+    public class EnergyManager : MonoBehaviour
+    {
+        public event Action EnergyChanged;
+        
+        public int CurrentEnergy
+        {
+            get => _energy;
+            set
+            {
+                if (_energy == value)
+                    return;
+
+                _energy = value;
+                EnergyChanged?.Invoke();
+            }
+        }
+        
+        private int _energy;
+        private LevelScene _levelScene;
+        
+        private void Awake()
+        {
+            _levelScene = FindObjectOfType<LevelScene>();
+        }
+
+        private void Start()
+        {
+            Watch.GetOrAdd("Energy", () => CurrentEnergy)
+                .SetSortOrder(TD_WatchSortOrder.Energy);
+        }
+
+        private void OnEnable()
+        {
+            _levelScene.MobManager.MobDiedByHp += OnMobDiedByHp;
+        }
+
+        public void ResetEnergy()
+        {
+            CurrentEnergy = _levelScene.LevelConfig.StartGold;
+        }
+        
+        private void OnMobDiedByHp(MobMain mob)
+        {
+            var reward = _levelScene.EconomyConfig.MobKillRewards[mob.Type];
+            CurrentEnergy += reward;
+        }
+    }
+}