Improve README documentation

[aarthiga-jayakumar]

This PR improves the README by adding a contribution section to guide new contributors.

Summary by Sourcery

Documentation:

• Expand README with a contribution section to guide new contributors on how to get involved.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates README documentation to better support new contributors by adding and refining contribution-related guidance.

File-Level Changes

Change	Details	Files
Enhance contributor guidance in the README.	Add a dedicated contribution section outlining how new contributors can get started Document basic workflow or expectations for submitting changes (e.g., forking, branching, and opening pull requests) Clarify any project-specific contribution conventions or links to further documentation	README.rst

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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[ArnavBallinCode]

Thank you for your contribution, closing this pr as this change is not in scope at the moment.
Please refer to open issues for future contributions!