ReStructuredText Support

[NaoPross]

Description

I have nothing against markdown (in fact, i use it quite often), but sometimes there are long notebooks, and it would be nice if it were possible to write using reStructuredText instead of markdown since it provides more advanced constructs. And also, almost all most docstrings in Python code are already written in reST so I think it would tie nicely with #719 .

Suggested solution

Something like:

mo.rst("ReStructuredText here!")

Alternative

No response

Additional context

No response

[akshayka]

Hi! Thanks for the feature request. I think we can support this.