Implement current test tracking and graceful shutdown in ContinuousSe…

…rver; enhance test execution flow to handle stop signals and cleanup resources properly.

Enhance .gitignore for build artifacts and IDE files; update README t…

…o introduce continuous server mode with usage examples; modify server API to support continuous operation.

修改：测试接口新增run函数

Add UDP protocol support and enhance error handling in configuration …

…application

Refactor test initialization order in iperf API: apply configuration …

…after initializing protocol list in both Client and Server.

新增迁移指南和库使用文档，重构命令行工具，优化配置管理和API设计

Update dependencies in go.mod and go.sum; downgrade Go version to 1.2…

…0, and refactor TCP info handling in iperf API tests.