Allow LaTeX snippets in chat

[joschahenningsen]

Unsure if this is really something we should implement depending on the complexity of a potential solution, but messages like this:

Would look much better if we allowed creating latex snippets. IMO this would require a more sophisticated chat input which I'm not sure we actually want.

[alexanderstephan]

I implemented this once with https://katex.org/, worked pretty well. Should be quite straight forward to add it.

[joschahenningsen]

Nice, so that renders the snippets in the frontend, right?

[alexanderstephan]

Yes, it renders in the browser, but it did feel pretty light weight.

[alexanderstephan]

Must be fast then 😂

[alexanderstephan]

~~https://pkg.go.dev/gopkg.in/oi-archive/blackfriday.v2#section-readme Technically, blackfriday already supports MathJax and MathJax supports LaTeX like syntax afaik. That would be an alternative, I suppose.~~ Nevermind, just a weird old repo.