feat(Card): 卡牌基本框架，尚未测试

Assets/Script/Card/CardEffect/EffectHandler.cs

@@ -0,0 +1,33 @@
+using UnityEngine;
+
+namespace Card
+{
+    public static class EffectHandler
+    {
+        public static void Execute(EffectData effect, CardContext context)
+        {
+            switch (effect.type)
+            {
+                case EffectType.Damage:
+                    context.Target.TakeDamage(effect.value);
+                    break;
+
+                case EffectType.Heal:
+                    context.Target.Heal(effect.value);
+                    break;
+
+                case EffectType.DrawCard:
+                    context.Player.Draw(effect.value);
+                    break;
+
+                case EffectType.AddBuff:
+                    //TODO:context.Target.AddBuff(effect.value);
+                    break;
+
+                default:
+                    Debug.LogWarning($"未知效果类型: {effect.type}");
+                    break;
+            }
+        }
+    }
+}