✨ [Feature] 证书管理功能

[devhaozi]

在提问之前 (Before Asking)

• 我已经搜索了全部 Issues 和 Commits (I have searched all Issues and Commits)
• 它们当中没有我将要提交的新功能 (None of them have new feature that I'm going to submit)

描述功能 (Describe Feature)

添加V1面板中的免费证书签发到V2面板。

工作流程 (WorkFlow)

None

还有别的吗 (Anything Else)

No response

[github-actions]

Hi @devhaozi 👋

我们认为您的建议非常有价值！欢迎提交 PR，请包含相应的测试用例、文档等，并确保 CI 通过，感谢和期待您的贡献！
We think your suggestion is very valuable! Welcome to submit a PR, please include test cases, documentation, etc., and ensure that the CI is passed, thank you and look forward to your contribution!

"Talk is cheap, Show me the Code." - Linus Torvalds

[devhaozi]

关联github.com/go-acme/lego，看起来非常有趣。