fix sphinx to render rotating gif

[m-reuter]

This PR aims to make the rotating snap_rotate GIF in the WhipperSnapPy tutorial render correctly in the Sphinx docs build (via nbsphinx/nbconvert), instead of degrading to a text/plain representation.

Changes:

Updates the tutorial notebook to save the rotation GIF to a local filename.
Adds Sphinx conf.py monkeypatches to include image/gif in nbsphinx output selection and rendering.
Patches nbconvert’s output extraction so image/gif gets written as binary bytes to extracted files.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.00%. Comparing base (d833146) to head (c42dc5c).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #59   +/-   ##
=======================================
  Coverage   40.00%   40.00%           
=======================================
  Files          23       23           
  Lines        2130     2130           
  Branches      327      327           
=======================================
  Hits          852      852           
  Misses       1177     1177           
  Partials      101      101           

Flag	Coverage Δ
unittests	40.00% <ø> (ø)

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[Copilot]

Pull request overview

This PR aims to make the rotating snap_rotate GIF in the WhipperSnapPy tutorial render correctly in the Sphinx docs build (via nbsphinx/nbconvert), instead of degrading to a text/plain representation.

Changes:

• Updates the tutorial notebook to save the rotation GIF to a local filename.
• Adds Sphinx conf.py monkeypatches to include image/gif in nbsphinx output selection and rendering.
• Patches nbconvert’s output extraction so image/gif gets written as binary bytes to extracted files.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 6 comments.

File	Description
tutorials/whippersnappy_tutorial.ipynb	Adjusts snap_rotate GIF output path intended to improve Sphinx accessibility.
doc/conf.py	Adds runtime patches for nbsphinx/nbconvert to select, render, and extract image/gif outputs.

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