Improved Readme by adding Table of Contents and Contributors section with contrib.rocks badge

[Yogender-verma]

Description

This PR improves the README documentation by adding a Table of Contents (TOC) and a Contributors section.

Changes Made

• Added a Table of Contents (TOC) to improve navigation across the README.
• Added a Contributors section using the contrib.rocks badge to showcase project contributors.
• Updated the TOC to include a link to the Contributors section.
• Improved overall structure, readability, and contributor visibility of the documentation.

Related Issues

Closes #713

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

How Has This Been Tested?

• Verified README renders correctly on GitHub.
• Confirmed TOC links navigate properly to all sections, including Contributors.
• Checked that contrib.rocks badge loads and links to the contributors graph page.

Checklist

• My code follows the code style of this project.
• I have performed a self-review of my own code.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.

[utksh1]

Reviewed. README TOC/contributors update is docs-only and low risk.