增加非官方翻译版本链接，中文

[jiachao2130]

增加了非官方版本的中文翻译链接（add unoffical tranlation for chinese)

[epage]

Can you enable issues for your fork so we can create translation-specific issues?

Should we update the repo link in book.toml to point to the translated repo, so people can open issues and make translation-specific improvements?

[jiachao2130]

I've enabled rust-cli-book-zh_CN's issues option, and updated the book.toml in zh_CN branch, pointed to the git , update the book name " Rust 中的命令行应用“