(client) feat:实现掉落物，UI显示，维度

Client/Assets/Scripts/Data/ItemDef.cs

@@ -10,7 +10,8 @@ namespace Data
     }
     public class ItemDef : Define
     {
-        public ImageDef texture;
+        public float FPS = 0;
+        public string[] textures;
         public ItemRarity rarity = ItemRarity.Common;
         public int maxStack = 10; // 最大堆叠数量，默认为10
         public bool ssEquippable = false; // 是否可装备