Revamp README.md with better structure and visuals

The project's README.md needs to be more professional and appealing to attract contributors. It should be easy to read and navigate.

Tasks:

Add a Project Banner: Use the banner we generated earlier at the top.

Structure: Organize the README with clear sections:

Project Overview

Features (use a bulleted list)

Algorithms Implemented (use a Markdown table)

Live Demo Link (if you have one)

Demo GIF: A short screen recording of the visualizer in action is essential.

Installation & How to Run Locally

How to Contribute

Add "Back to Top" links: To improve navigation in a long README, add an anchor at the top and links at the end of major sections.

At the very top of the file, add:

At the end of a section, add: Back to Top