Add example for plot_func

[rohanbabbar04]

Description

Fixes #308
Added a small custom plot example using plot_func in docs/examples/observed_space_examples.ipynb
@aloctavodia do check once

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 ✅

Comparison is base (6f270f6) 80.15% compared to head (635aad7) 80.13%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #311      +/-   ##
==========================================
- Coverage   80.15%   80.13%   -0.03%     
==========================================
  Files          34       34              
  Lines        4178     4178              
==========================================
- Hits         3349     3348       -1     
- Misses        829      830       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[aloctavodia]

Thanks @rohanbabbar04.

I have two suggestions

• Add a sentence saying something like "predictive_explorer supports 3 types of plots, empirical cdfs, kdes and histogram. Besides, you can also add custom Matplotlib code..."

• Change the name of the function from hist to custom_hist or something similar.

[rohanbabbar04]

Thanks @aloctavodia,

• Have added the line - predictive_explorer supports three types of plots: empirical cumulative distribution functions (CDFs), kernel density estimations (KDEs), and histograms. Additionally, you can also add custom Matplotlib code using the plot_func parameter.
• Changed the function name from hist to custom_hist