Improve visualization module documentation

[Kaustbh]

Fixes: #2580

To address this issue, the following fixes are proposed:

1. Adding New Notebooks:
   Introduce notebooks for the distances and estimator modules, providing examples and explanations for better usability.

2. Fixing Duplication:

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[Kaustbh]

This is the initial commit for adding a notebook on distance matrix visualization. More updates and improvements will follow.