fix(bridge/nd): add boss check (#1578)

Author: Andyyy7666

modules/bridge/nd/server.lua

@@ -98,6 +98,15 @@ function server.buyLicense(inv, license)
 	return true, "have_purchased"
 end
 
+---@diagnostic disable-next-line: duplicate-set-field
+function server.isPlayerBoss(playerId, group)
+    local player = NDCore.getPlayer(playerId)
+    if not player then return end
+
+    local groupInfo = player.getGroup(group)
+	return groupInfo and groupInfo.isBoss
+end
+
 ---@param entityId number
 ---@return number | string
 ---@diagnostic disable-next-line: duplicate-set-field