Improve handling of notebooks in documentation

[baharcos]

This PR changes the handling of notebooks in documentation from nbsphinx to myst-nb.

• up-to-date/maintained better
• option to force the execution of notebooks without needing to delete the outputs
• option to exclude some notebooks from the forced execution
• adjustable maximum cell execution time

Current caveats:

• the download feature of the notebooks is lost but potentially can be reintroduced
• it has to be manually checked whether the notebook cells run without errors

Jax is used as the example case:
developer notes
readthedocs.yml
configuration
requirements

[codecov]

Codecov Report

Merging #425 (78ae2f0) into main (66ac796) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #425      +/-   ##
==========================================
+ Coverage   92.84%   92.87%   +0.02%     
==========================================
  Files         231      231              
  Lines       17590    17590              
==========================================
+ Hits        16332    16337       +5     
+ Misses       1258     1253       -5     

Impacted Files	Coverage Δ
src/estimagic/optimization/subsolvers/bntr.py	86.77% <0.00%> (+0.38%)	⬆️
src/estimagic/optimization/subsolvers/_trsbox.py	85.77% <0.00%> (+0.81%)	⬆️
src/estimagic/__init__.py	100.00% <0.00%> (+8.33%)	⬆️

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[baharcos]

The latex rendering is not working properly in this notebook even when it's not executed while building and I couldn't fix.
@janosg Do you know how to have
from IPython.core.display import HTML, Latex
from IPython.display import IFrame
in the rtd_environment (ipython is already in the rtd_environment)?

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[janosg]

Thanks!