rename plot_pava and minor fixes

[aloctavodia]

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📚 Documentation preview 📚: https://arviz-plots--140.org.readthedocs.build/en/140/

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 18.18182% with 9 lines in your changes missing coverage. Please review.

Project coverage is 79.03%. Comparing base (9ef8965) to head (1a4e7e8).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/arviz_plots/plots/pavacalibrationplot.py	14.28%	6 Missing ⚠️
src/arviz_plots/backend/bokeh/__init__.py	0.00%	1 Missing ⚠️
src/arviz_plots/backend/matplotlib/__init__.py	0.00%	1 Missing ⚠️
src/arviz_plots/backend/plotly/__init__.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #140      +/-   ##
==========================================
- Coverage   79.07%   79.03%   -0.05%     
==========================================
  Files          29       29              
  Lines        3360     3367       +7     
==========================================
+ Hits         2657     2661       +4     
- Misses        703      706       +3     

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