Add more mathjax packages

[tani]

First of all, thank you for the great project. I am enjoying writing academic documents :)

In my community, we use a special package to write scientific and technical documents, and MathJax is fortunate enough to support it, so I wanted to use it in this project. Also, since this is likely to be the case in various communities, I've added the possible packages as long as they don't cause errors in testing. If it is possible, could you please consider adding the feature?

Honestly, I just want to use amscd and bussproofs in Mathpix.

Thank you very much.

[OlgaRedozubova]

Thanks a lot for your PR. But it won't work in the current version.
Since we are using [email protected]
These packages are not supported in this version.