docs: enhance README with structured sections and project clarity

[Yogender-verma]

Description

This PR improves the README.md by restructuring and enhancing documentation to make the project more developer-friendly and easier to understand for new contributors.

It adds clearer explanations of the project architecture, data flow, setup instructions, and overall usage while keeping the documentation clean and concise.

Linked Issue

Fixes #119

Changes Made

• Added structured Table of Contents
• Improved Overview and Purpose sections
• Enhanced Features with clear explanations
• Added Architecture and Data Flow sections
• Improved Project Structure for better clarity
• Updated How to Run Locally instructions
• Added Usage and Tech Stack sections
• Added Contributors section with contrib.rocks badge
• Improved overall readability and consistency of README

Type of Change

• Bug fix
• New feature
• UI/Visual update
• Documentation update
• Refactor

Testing

• Tested locally by rendering README on GitHub preview
• Verified all links and sections are working correctly
• Ensured images (screenshots) load properly

Checklist

• My code follows the project's coding style
• I have performed a self-review of my changes
• My changes generate no new warnings or errors
• I have updated documentation if required
• I have linked the relevant issue

Screenshots / Screen Recording

Not applicable (documentation-only changes)

[github-actions]

Thank you for submitting a pull request.

Please ensure your changes comply with the project's contribution guidelines and that all workflow checks pass successfully.

A maintainer will review your submission shortly.