Prepare 0.23 release

[OriolAbril]

Description

Prepare last "monolithic ArviZ" release.

Checklist

• Follows official PR format
• Includes a sample plot to visually illustrate the changes (only for plot-related functions)
• New features are properly documented (with an example if appropriate)?
• Includes new or updated tests to cover the new feature
• Code style correct (follows pylint and black guidelines)
• Changes are listed in changelog

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📚 Documentation preview 📚: https://arviz--2499.org.readthedocs.build/en/2499/

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[codecov]

Codecov Report

❌ Patch coverage is 54.05405% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.81%. Comparing base (4db6129) to head (9bce253).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
arviz/preview.py	38.46%	16 Missing ⚠️
arviz/__init__.py	90.90%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (54.05%) is below the target coverage (75.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2499      +/-   ##
==========================================
- Coverage   86.84%   86.81%   -0.03%     
==========================================
  Files         124      124              
  Lines       13036    13046      +10     
==========================================
+ Hits        11321    11326       +5     
- Misses       1715     1720       +5     

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[tomicapretto]

@OriolAbril, do you think this is ready for a final review and merge?