Description

This PR updates the README.md with:

• Clearer step-by-step contribution guidelines
• Proper formatting and code blocks for setup instructions
• Official Keploy social links (LinkedIn, YouTube, Twitter)
• A polished and welcoming tone for new contributors

Type of change

• This change requires a documentation update

How Has This Been Tested?

Manually reviewed the rendered README on a markdown previewer and tested the cloned project setup using the documented instructions. Verified the formatting, clarity, and correctness of all updated sections.

No UI changes introduced.

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Checklist:

• My code follows the style guidelines 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
• New and existing unit tests pass locally with my changes (N/A for docs)
• I have checked my code and corrected any misspellings
• I have tagged the reviewers in a comment below in case my pull request is ready for a review
• I have signed the commit message to agree to the Developer Certificate of Origin (DCO) by adding --signoff to my git commit command