docs: add comprehensive README and MIT license

[rajit2004]

What this PR adds

This PR improves the project's documentation and licensing:

📄 Added

• Comprehensive README.md – with badges, tech stack table, feature list, project structure, setup instructions, and screenshots table.
• MIT License – adds a proper open-source license to the project.

📸 Screenshots

Sign In	Create Account	Chat Interface

✨ Why this matters

• Makes the project more discoverable and professional
• Provides clear setup instructions for new contributors
• Adds legal clarity with the MIT license
• Documents all features in one place

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Note: I've also cleaned up the repo structure. All core code remains unchanged.

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Let me know if you'd like any changes or have questions!

[vercel]

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