Transition to Jupyter Book v2

[mwouts]

This PR upgrades Jupyter Book from v1 to v2.

Check list

• outputs are present
• book compiles with no warning ('jupytext' extra key ignored: notebook_metadata_filter)
• quarto example generated separately is available
• rendering is similar (book sections start open, no extra header etc)
• previous redirects still work

#myst-education-2026

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.22%. Comparing base (79be4fc) to head (067ba09).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #570      +/-   ##
==========================================
- Coverage   94.28%   94.22%   -0.07%     
==========================================
  Files          48       48              
  Lines        2748     2735      -13     
==========================================
- Hits         2591     2577      -14     
- Misses        157      158       +1     

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[github-actions]

Thank you for making this pull request.

Did you know? You can try it on Binder: .

Also, the version of ITables developed in this PR is available as a wheel artifact 📦 for easy installation.
Download it here, unzip it and then run pip install itables-xxx.whl in the unzipped directory.

A conda package is also available for easy installation:
Download it here, and then run conda install itables-xxx.tar.bz2 in the directory where you downloaded the file.