Add a rehype plugin to use mathlive renderer

[66Leo66]

Initial checklist

• I read the support docs
• I read the contributing guide
• I agree to follow the code of conduct
• I searched issues and couldn’t find anything (or linked relevant results below)

Problem

I'd like to use https://github.com/arnog/mathlive to generate markups for math formula.

Solution

Add a new package rehype-mathlive. Mathlive has decent SSR support and requires no browser-side dependency but only a css. It has nice support for latex commands and also mhchem out-of-the-box. Also I think it's based on custom fonts so it looks nice and can be easily sclaed up and down for example.

Alternatives

Given that rehype-katex is implemented in a single file, I think intergating mathlive won't be too difficult. If acceptable, I could try to do it on my own and send a PR, though I'm not so familiar with remark/rehype.

[JounQin]

You can write your own package rehype-mathlive first in your own repository to judge whether it would work as expected.

There is no need to add it as a core module into remark-math at this time.

See also https://github.com/remarkjs/remark/blob/main/doc/plugins.md#list-of-plugins