feat(shop): 添加道具购买相关配置

- 在 shop.config 文件中增加了 batchbuy 和 Maxbatchbuy 字段
- batchbuy 设置为 1，表示支持批量购买
- Maxbatchbuy 设置为 999，限定单次购买的最大数量

LogicServer/data/config/shop/shop.config

@@ -69,6 +69,8 @@ ShopConfig={
 			reincarnationlimit = 0,
 			daylimit = 0,
 			buytype = {},
+			batchbuy = 1,
+			Maxbatchbuy = 999,
 		},
 		[7] = {
 			shoptype = 1,