Add python-inspector usage example #300

[cs1m2414238]

Fixes #300

Summary

Add an example usage section for python-inspector documentation.

This update helps users understand how to install and use python-inspector
to analyze a package and inspect its dependencies.

Changes

• Added an example command using python-inspector analyze requests
• Added a short explanation of the command output
• Improved documentation readability and usability for new users

Why This Change Is Needed

New users may find it difficult to understand how to use
python-inspector without a practical example. This documentation update
provides a simple workflow that demonstrates package analysis and
dependency inspection.

Tasks

• PR is descriptively titled 📑 and links the original issue above 🔗
• Tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR
• Commits are in uniquely-named feature branch and has no merge conflicts 📁