[PEP518] Improve testsuite packaging

[IAlibay]

Changes made in this Pull Request:

• Adds pyproject.toml to testsuite
• Clears up ambigous packaging
• Keeps setup.py for dynamic things only
• Update license file
• Update links info
• Update some setup.py docstring text
• Adds various missing init files

PR Checklist

• Tests?
• Docs?
• CHANGELOG updated?
• Issue raised/referenced?

Developers certificate of origin

• I certify that this contribution is covered by the LGPLv2.1+ license as defined in our LICENSE and adheres to the Developer Certificate of Origin.

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📚 Documentation preview 📚: https://mdanalysis--4463.org.readthedocs.build/en/4463/

[pep8speaks]

Hello @IAlibay! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file testsuite/setup.py:

Line 83:29: E261 at least two spaces before inline comment

Comment last updated at 2024-02-23 07:10:18 UTC

[github-actions]

Linter Bot Results:

Hi @IAlibay! Thanks for making this PR. We linted your code and found the following:

There are currently no issues detected! 🎉

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.37%. Comparing base (2192fbb) to head (7b69052).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4463      +/-   ##
===========================================
- Coverage    93.38%   93.37%   -0.01%     
===========================================
  Files          171      183      +12     
  Lines        21744    22822    +1078     
  Branches      4014     4014              
===========================================
+ Hits         20305    21310    +1005     
- Misses         952     1025      +73     
  Partials       487      487              

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[IAlibay]

Thanks for the review @RMeli - I think I've addressed most comments, the social media stuff might need more discussion. I'm of the opinion that the pyproject.toml url links barely get used so we could probably just not think about them too much.

[RMeli]

Thanks Irfan, LGTM