ENH: include jupyterlite in the supported extention

[12rambau]

#745, Fix #755

It's not working locally and my issue is on stale (jupyterlite/jupyterlite-sphinx#76). I'll try distant build to see if the behaviour improves.

[choldgraf]

FYI this seems to work on the readthedocs build - are there any specific styles etc you wanted to add? Otherwise I'm +1 on just merging this in as a docs PR and using follow-up issues/PRs to spot-check any specific thing that needs to be improved

[12rambau]

I have an open issue on their repositiory to understand how to use a file and it will be good to go

[12rambau]

ok so before making this one ready for review I'm missing a handle to switch the jupyterlite theme when our switcher is modified.

The issue is opened here and I think we should not add it until we have a working set up

[12rambau]

@choldgraf I would say let's merge this one and keep the color switch issue open (#745). They are using our theme on their side (https://jupyterlite-sphinx.readthedocs.io/en/latest/installation.html) so they will need to add support eventually.

[choldgraf]

Makes sense to me - are the failing tests real?

[12rambau]

oh yes, they are. I just added a disclaimer I didn't though I would break anything. It seems to be related to jupyterlite/jupyterlite-sphinx#27 but I need to investigate (the issue is closed on their side)

[12rambau]

@choldgraf as you decided to use MySTNB to parse the pydata.md file, I decided to move the execution libs in their own page so that the display is shown when they are used alone.

[choldgraf]

This looks good to me - just a quick comment on having a clean separation of execution library patterns. LMK what you think.

[12rambau]

It's here for a long time and seems to work, I consider last comment from @choldgraf as a semi-approval. If nobody complains, I'll merge it tomorrow. the styling will be done in a follow-up PR.