Added authentication and join room routes

[ekanshgupta2046]

Description

This pull request adds authentication and room management functionality to the application.

• Implements JWT-based user authentication with login and registration routes.
• Adds a /me route to fetch the currently logged-in user's data.
• Adds routes for joining and creating rooms.
• Updates frontend to handle protected routes and room actions.

Semver Changes

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

Issues

closes #40

Checklist

• I have read the Contributing Guidelines.

[04shubham7]

NIce Work