add 2.0 documentation and make it the stable version

[mattip]

I followed the instructions in the Makefile, except for the force push.

[mattip]

cc @charris

[mattip]

Beyond adding the 2.0 files, I also

• edited the index.html
• added the version to version.json
• used the python update.py script to update the old version warning, which I do not see anymore even on the existing documentation (???)
• changed the stable symbolic link to point to 2.0

[melissawm]

The version warning should be provided by the pydata sphinx theme now - so we should add

html_theme_options = {
    ...
    "show_version_warning_banner": True,
}

to conf.py (see https://pydata-sphinx-theme.readthedocs.io/en/latest/user_guide/announcements.html#version-warning-banners - this page will actually show the functionality at the top)

[mattip]

The version warning should be provided by the pydata sphinx theme now

Can we do that in a follow on? I think this should be merged soon

Edit: make the responseinto a question

[melissawm]

The stable docs will have to be rebuilt for that. If that's not an issue I'm happy to do It in a follow up 👍

[mattip]

I don't think rebuilding is an issue. More of a problem is getting the warning into the 1.26 and earlier docs.

[charris]

Lets just get this in.

[melissawm]

I just submitted a PR to fix the version switcher as well: #25

I'll send another to turn on the version warning banner for the newer versions of the docs.

[charris]

@melissawm Is there any reason not to merge this? If not, hit the merge button.

[melissawm]

Please merge, we can fix the warning banner later. Just make sure to also merge the version switcher json update over at #25

[charris]

Melissa, I want you to merge. You will feel better after :)

EDIT: Do you have commit rights?

[melissawm]

I do, thanks @charris - let's do it, if I break it, it won't be the first time 😄