Submitting new extension - CodeRunner

[xr4dsh]

Hello Oobabooga,

i would like to submit a new Extension for text-generation-webui: https://github.com/xr4dsh/CodeRunner
It allows to inline code execution, currently only in python.
I made the extension, because there does not seem to be any extension that does something similar.

It uses thebe to connect to a jupyter server that executes the code.

I also opened a pull request in your other project, be cause it needs a change in the markdown generation to function properly.
oobabooga/text-generation-webui#5147
It is not clear to me how changes that are only needed for one extension are handled.

It is currently a bit yankee, so i would like to get some feedback on it.