Support for \lim, \cos, \sin

[AminMemariani]

Given the latex value: '\lim_{x\rightarrow0}\frac{1-\cos x}{\sin^2x}'

the library could not parse the \lim, \cos and \sin and throughs exceptions.

[github-actions[bot]]

Hi 👋🏽 Thank you for opening your first issue with CaTeX ❤

You can expect triage from us soon 🙂 In the meantime, you can try to search for similar issues in our issue database.

[creativecreatorormaybenot]

These functions are not yet supported by CaTeX.

We understand that these are basic functions that should be supported (that is why the package is a pre-release).
We will add them soon after refactoring some of the parsing and rendering in order to have a final setup 👍🏽

You can make a PR as well if you are interested.