feat: setup for socket.io done

[ADARSHsri2004]

Description

Implemented real-time collaborative drawing using Socket.io.

• Set up a Socket.io server in the Node.js backend.
• Integrated Socket.io client in the React frontend.
• Users can draw on a shared canvas, and all other users in the same room see the strokes instantly.
• Handled multiple rooms so that drawings are isolated by room ID.
• Events implemented: connection, disconnect, draw, join-room.
• Ensured smooth, low-latency updates with consistent canvas state across clients.

This pull request resolves the issue of enabling real-time drawing collaboration among users.

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Semver Changes

• Patch (bug fix, no new features)
• Minor (new features, no breaking changes)
• Major (breaking changes)

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Issues

Closes the issue #2 for real-time collaborative drawing with Socket.io.

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Checklist

• I have read the Contributing Guidelines
• Tested that drawing updates are synchronized across multiple clients in the same room