feat(login): 引入基于 IP 的限流中间件

新增 github.com/xiaoqidun/limit 依赖，替换原有的全局速率限制器，
实现针对客户端 IP 的细粒度限流控制。在服务启动时初始化限流器，
并在程序退出前确保后台任务正确停止。同时更新 go.work 和 login/go.sum
文件以包含新的依赖项。此外，在 logic/main.go 中添加了主玩家数据
保存逻辑以确保服务关闭时数据持久化。

common/utils/limit/NOTICE

@@ -0,0 +1,13 @@
+   Copyright 2025 肖其顿
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.