DOC: auto generate doc images and code outputs

[mj-will]

This PR updates the docs to auto-generate plots and code outputs.

This makes it easier to keep the documentation up-to-date.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.89%. Comparing base (1ff98a9) to head (d844216).
Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #446   +/-   ##
=======================================
  Coverage   93.89%   93.89%           
=======================================
  Files          72       72           
  Lines        7027     7027           
=======================================
  Hits         6598     6598           
  Misses        429      429           

Flag	Coverage Δ
unittests	93.89% <ø> (ø)

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