feat(Card): 卡牌基本框架，尚未测试

Assets/Script/Share/ICharacter.cs

@@ -0,0 +1,15 @@
+using UnityEngine;
+
+namespace Share
+{
+    /// <summary>
+    /// 角色接口，可受伤害、治疗和添加Buff
+    /// </summary>
+    public interface ICharacter
+    {
+        public void TakeDamage(int damage);
+        public void Heal(int heal);
+        public void AddBuff(string buffName, int duration);
+        public void Draw(int count);
+    }
+}