Add autodocs for all libraries, take 2 [only docs]

[gdalle]

Replaces #2967

[maleadt]

Superficially LGTM, but we sadly don't have preview functionality set-up. I take it you checked locally this looks OK?

[gdalle]

I didn't try to check this locally for lack of an NVIDIA GPU, should I?

[gdalle]

My intuition was that doctests would fail anyway if I tried to build locally

[gdalle]

Can anyone try building these docs locally?

[kshyatt]

Trying now

[kshyatt]

Doc build failed, I'll upload the log later

[gdalle]

Why did the ci get a green check 🤔?

[gdalle]

So apparently the docs build fails locally (according to @kshyatt) with this log
doclog.txt

I added the missing Adapt dep but the others seem to be failing doctests that I cannot fix locally for lack of an NVIDIA card. @maleadt who do you think could help out to get this merged?

[gdalle]

The other doctests worked this time on Buildkite, so maybe we're good to go!

[maleadt]

Sections are empty:

[gdalle]

That probably means there are no docstrings in that library to begin with? I only set up autodocs so that if those docstrings exist, they will be displayed