fix: pdf file in releases

[clatapie]

Closes #2660

See #2665 (comment)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (304ebb2) 85.00% compared to head (be73b37) 82.97%.
Report is 17 commits behind head on main.

❗ Current head be73b37 differs from pull request most recent head bb953c5. Consider uploading reports for the commit bb953c5 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2665      +/-   ##
==========================================
- Coverage   85.00%   82.97%   -2.03%     
==========================================
  Files          47       47              
  Lines        9323     9322       -1     
==========================================
- Hits         7925     7735     -190     
- Misses       1398     1587     +189     

[germa89]

I'm taking over this PR because @clatapie is busy with more important tasks.

Basically there was two source of errors:

• Using GIFs in latex. It seems that importing GIFs files in latex was giving error (no bounding box, and not being able to open the files). This has been fixed by pre-processing those animated GIF files to convert them into static PNG. This conversion has been done in the new post_process_latex.py which replaces and expand validate_pngs.py
• The usage of fontawesome in Latex which generates errors. Fixed by installing the fonts (texlive-fonts-extra) and suppressing those warnings.

Also I did:

• Check PDF is not corrupted and can be opened with qpdf tool.
• Reduce the size of the manifold.gif file.

[germa89]

Ready to review @clatapie !

[clatapie]

LGTM, thank @germa89 for having fixed it!
I can't approve it as I was the one opening the PR.