add zhlint as suggested tool for translating/reviewing zh-cn

[vasfvitor]

https://zhlint.jinjiang.dev/

related: https://github.com/sparanoid/chinese-copywriting-guidelines

english version: https://github.com/sparanoid/chinese-copywriting-guidelines/blob/master/README.en.md

[GuoJikun]

add a npm scripts?
how name is if yes?
example i18n:zhlint

[vasfvitor]

my initial idea was just to add it to contributing.md or translating.md guide as a suggestion, along other tools and tips. But now re-reading the issue I see it is not clear.

On the other hand I think it could be useful to run it when opening a PR that modifies files at src/docs/zh-cn or something, then the PR author can fix the errors.

I'm not sure if adding it directly to the repo is a good idea. I'm not opposed, but I prefer to hear opinions on it