docs: add documentation

[12rambau]

WIP

Open question: where do you want to share the documentation, ReadTheDocs or github page ?

I personnaly prefers RDT as ther offer multiple sweet tools like automatic PR builds

[santiagobasulto]

Yes, I agree with RDT.

[12rambau]

Perfect then if we go toward RDT, could you from you side start a RDT documentation project and activate the "build on PR" so that I can check the build from here ?
Also I would need the nox build to create local venv and check RDT requirements in isolation. Is there anything I should add to #7 ? If not I'll wait for it to be merge to master and rebase before moving forward

[santiagobasulto]

Perfect, I think i've done the RTD integration. I'll switch to #7 so we can merge that and try it out

[santiagobasulto]

Is the RTD integration working? https://readthedocs.org/projects/ipython-gpt/builds/

[12rambau]

my last commit should have triggered a PR build, can you confirm you applied this: https://docs.readthedocs.io/en/stable/pull-requests.html

[santiagobasulto]

Done

[12rambau]

The pre-build is up and running: https://ipython-gpt--8.org.readthedocs.build/en/8/index.html

Let me know what you think (I'll stop for today and see tomorrow to execute the cells of the usage section and send users to binder/collab)