Upgrade to Python 3.12#1

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chpolste wants to merge 5 commits intomainfrom

Commits on Nov 22, 2024

Configure a Python 3.12-based environment
chpolste
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Commits on Apr 2, 2025

Commits on Apr 3, 2025

Downgrade jupyterlab and notebook until myst catches up with their CSS
chpolste
committed