feat(admin): 新增限流器 add rate limiting middleware for backend

- Add rate limiting functionality to the admin panel
- Implement rate limiting middleware to control API request frequency
- Update login controller to use rate limiting Add helper functions for getting IP and admin UID
- Update route configuration to include rate limiting middleware
- Add Redis configuration to .env file
- Update composer.json to include rate limiting package dependency

.example.env

@@ -14,6 +14,16 @@ DB_PORT=3306
 DB_CHARSET=utf8mb4
 DB_PREFIX=ea8_
 
+# 限流器开关
+RATE_LIMITING_STATUS=false
+
+# Redis配置
+REDIS_HOST=127.0.0.1
+REDIS_PORT=6379
+REDIS_PASSWORD=
+REDIS_PREFIX=
+REDIS_DATABASE=0
+
 # 后台配置项组
 [EASYADMIN]