docs: refine README with improved structure and content updates

[J-rayX]

Updates made to the README

1. Revised Section: provided a clearer introduction, project layout, and technical reference sections.
2. Added Table of Contents: for better navigation.
3. Enhanced Guides Instructions: restructured the overview section for more readability.
4. Improved Contributing Guidelines: to make it more accessible and clearer for new contributors.
5. New Products Checklist: improved the checklist format.
6. Installation & Local Development: provided clearer instructions and commands for installation and local devt setup.

[vercel]

@J-rayX is attempting to deploy a commit to the Uniswap Team on Vercel.

A member of the Team first needs to authorize it.