Refactor: Improve professionalism and structure of README.md

[adithyapaib]

This commit significantly enhances the README.md file by:

• Correcting typos and grammatical errors.
• Improving overall formatting, structure, and readability with clearer headings and sections.
• Refining language to be more professional and welcoming, while maintaining the project's tone.
• Fixing broken image links, ensuring correct paths, and adding descriptive alt text to all images.
• Adding a clear project introduction.
• Enhancing the "How to Contribute" and "Support Us" sections.
• Adding a "Meet Our Contributors" section with a placeholder link to the GitHub contributors graph (to be updated by the repo owner).

The existing content and core message of the README have been preserved.