Documentation for TLS certificates managed by Caddy

# Use case

I use Caddy to manage my certificates. [The documentation](https://foxcpp.dev/maddy/tutorials/setting-up/) mentions how to work with Let's Encrypt and certbot and ACME.sh, but I don't use those and don't know how to use those.

# Your idea for a solution

Could we please write some documentation on how to work with TLS certificates managed by Caddy? I'd be willing to help test the instructions as a clueless noob.

- [x] I'm willing to help with the implementation

从链接的设置教程开始，将其中关于 Let's Encrypt、certbot 和 ACME.sh 的指导与 Caddy 管理的证书进行比较。使用 Caddy 管理的证书验证这些说明，然后清晰地记录设置和使用方法，使其足以满足所报告的使用场景。

由索引模型根据 Issue 内容生成。