feat(Card): 卡牌基本框架，尚未测试

Assets/Script/Card/CardEffect/CardContext.cs

@@ -0,0 +1,10 @@
+using UnityEngine;
+using Share;
+namespace Card
+{
+    public class CardContext
+    {
+        public ICharacter Player;
+        public ICharacter Target;
+    }
+}