DOC: make simple animation example easier to find

[rcomer]

PR summary

Closes #31464, following @story645's 3-point plan #31464 (comment)

AI Disclosure

Copilot suggestions were switched on, but I don't think they helped.

PR checklist

• "closes #0000" is in the body of the PR description to link the related issue
• [n/a] new and changed code is tested
• [n/a] Plotting related features are demonstrated in an example
• [n/a] New Features and API Changes are noted with a directive and release note
• Documentation complies with general and docstring guidelines

[rcomer]

https://output.circle-artifacts.com/output/job/c3fe11b4-083f-4756-8ed9-d35a8fe2a6f3/artifacts/0/doc/build/html/gallery/animation/index.html

[story645]

Thanks!

[timhoffm]

Change to “Basic”?

[rcomer]

Sure, done.

[timhoffm]

You may want to add the file here so that is is the first in the subsection:

matplotlib/doc/sphinxext/gallery_order.py

Line 90 in ec9a0ea

"scales", # Scales overview

[rcomer]

Thanks @timhoffm I didn't realise we had that, and I think it's preferable to creating a re-direct.

[rcomer]

https://output.circle-artifacts.com/output/job/b6c39cda-799b-433d-b867-a2435e241090/artifacts/0/doc/build/html/gallery/animation/index.html

[timhoffm]

Thanks @timhoffm I didn't realise we had tha

It's not ideal from a usability standpoint (sphinx-gallery could provide better support for explicit sorting in subgalleries), but it does the job.