Improve Docs for predictive functions

[rohanbabbar04]

Description

• Remove Thebe Functionality Remove Thebe functionality #463.
• Improve the docs to handle optional dependency of bambi and pymc Manage optional import of PyMC and Bambi in the docs #464 and Dependencies list for documentation incomplete #462

Checklist

• Code style is correct (follows pylint and black guidelines)
• Includes new or updated tests to cover the new feature
• New features are properly documented (with an example if appropriate)
• Includes a sample plot to visually illustrate the changes (only for plot-related functions)
• Widget states have been properly saved (only for notebooks with widgets) see for details.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.35%. Comparing base (cd776ae) to head (4db5f13).
Report is 23 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #468      +/-   ##
==========================================
+ Coverage   80.74%   82.35%   +1.61%     
==========================================
  Files          92       96       +4     
  Lines        7556     7896     +340     
==========================================
+ Hits         6101     6503     +402     
+ Misses       1455     1393      -62     

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[OriolAbril]

You should also remove the thebe related dependencies and configuration:

• https://github.com/arviz-devs/preliz/blob/main/docs/conf.py#L50
• https://github.com/arviz-devs/preliz/blob/main/docs/conf.py#L60
• https://github.com/arviz-devs/preliz/blob/main/requirements-docs.txt#L4

[aloctavodia]

Oops, I merge this by mistake. You can modify the rest in a separated PR