feat(item): 添加三阶魔器宝箱及其相关配置

- 在 dropgroup.config 中添加了新的掉落组配置（ID 100881）
- 在 droptable.config 中添加了新的掉落表配置（ID 2100188）
- 在 StdItems.config 中添加了三阶魔器宝箱的物品配置（ID 1394）

LogicServer/data/config/item/StdItems.config

@@ -46508,4 +46508,36 @@ StdItems = {
 		trade = 1,
 		type = 8,
 	},
+	[1394] = {
+		cdTime = 0,
+		colGroup = 0,
+		conds = {},
+		dealPrice = 10,
+		dealType = 0,
+		denyDeal = 1,
+		denyDestroy = 1,
+		denySell = 1,
+		desc = "打开后随机获得三阶魔器中的任意一件，获得随机奖励",
+		dropBroadcast = 0,
+		dropGroupid = 100881,
+		dup = 9999,
+		existScenes = { -1 },
+		icon = 13509,
+		id = 1394,
+		isShowUseBtn = 1,
+		iseffect = 127,
+		itemlvl = 3,
+		name = "三阶魔器宝箱",
+		packageType = 2,
+		recordLog = 1,
+		recoverid = 0,
+		shape = 0,
+		showQuality = 5,
+		staitcAttrs = {},
+		suggVocation = 0,
+		suitId = 0,
+		time = 0,
+		trade = 3,
+		type = 131,
+	},
 }