Add Tutorial "Projection approaches for Optimal Transport"

[vmart20]

Project for OT-ENSAE 2023.

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[vmart20]

I've added new words ("mathbb" and "rightarrow") in docs/spelling/latex.txt to ignore spelling warnings in latex.

[michalk8]

I've added new words ("mathbb" and "rightarrow") in docs/spelling/latex.txt to ignore spelling warnings in latex.

These need not be added, if you look at https://ott-jax--368.org.readthedocs.build/en/368/tutorials/notebooks/projection_approaches.html, the equation doesn't render properly.

[vmart20]

The lint error is because of this:
/home/runner/work/ott/ott/docs/_autosummary/ott.tools.gaussian_mixture.gaussian.Gaussian.from_samples.rst:3: WARNING: broken link: https://www.gnu.org/software/gsl/doc/html/statistics.html#weighted-samples

This is not related to this commit and the website is up now.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.43%. Comparing base (31df701) to head (df00819).
Report is 179 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #368   +/-   ##
=======================================
  Coverage   88.43%   88.43%           
=======================================
  Files          51       51           
  Lines        5605     5605           
  Branches      836      836           
=======================================
  Hits         4957     4957           
  Misses        529      529           
  Partials      119      119