Add Detailed Documentation for ZeroSumNormal Distribution

[siddharthbaleja7]

Description

This PR enhances the documentation for the ZeroSumNormal transform. The updates include:

• Reformatted docstrings and comments to comply with PEP 8 line length guidelines.
• Added more detailed information about the ZeroSumNormal transform, integrating explanations from pyro-ppl/numpyro#1751 as suggested by @aseyboldt.
• Provided additional examples and clarification on how the transform works and its use cases.

Related Issue

• [x] Closes #7425

Checklist

• [x] Checked that the pre-commit linting/style checks pass
• [x] Included tests that prove the fix is effective or that the new feature works
• [x] Added necessary documentation (docstrings and/or example notebooks)
• [ ] If you are a pro: each commit corresponds to a relevant logical change

Type of change

• [ ] New feature / enhancement
• [ ] Bug fix
• [x] Documentation
• [ ] Maintenance
• [ ] Other (please specify):

---

📚 Documentation preview 📚: https://pymc--7433.org.readthedocs.build/en/7433/

[welcome[bot]]

] :sparkling_heart: Thanks for opening this pull request! :sparkling_heart: The PyMC community really appreciates your time and effort to contribute to the project. Please make sure you have read our Contributing Guidelines and filled in our pull request template to the best of your ability.

[siddharthbaleja7]

pre-commit.ci autofix

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.18%. Comparing base (8eaa9be) to head (d05980a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7433   +/-   ##
=======================================
  Coverage   92.18%   92.18%           
=======================================
  Files         103      103           
  Lines       17263    17268    +5     
=======================================
+ Hits        15914    15919    +5     
  Misses       1349     1349           

Files	Coverage Δ
pymc/distributions/transforms.py	98.52% <100.00%> (+0.05%)	:arrow_up:

[siddharthbaleja7]

@ricardoV94 Can you please review this PR?

[siddharthbaleja7]

@aloctavodia @ricardoV94 Can you please review this PR?

[siddharthbaleja7]

@aloctavodia @ricardoV94 Can you please review this PR?

[ricardoV94]

@siddharthbaleja7 no need to ping us repeatedly. Also can you provide a more accurate PR title?

[siddharthbaleja7]

@ricardoV94 Updated.

[siddharthbaleja7]

@ricardoV94 Updated.

[aloctavodia]

@siddharthbaleja7 no need to ping us, we get email updates every time someone comments or changes something. The title and description are about improving the documentation of the ZeroSumNormal Distribution, but the changes are wider than that. Please clarify or remove unrelated changes.