real time chat app added

[Harshit457]

Closes: #1080

• Real-Time Chat App
• Harshit
• IWOC

Describe the add-ons or changes you've made 📃

• Implemented a real-time chat application using Node.js, Express, and Socket.io.
• Users can send and receive messages instantly.
• Integrated Cloudinary for image uploads.
• Added JWT-based authentication and authorization.
• Implemented MongoDB as the database with Mongoose models.
• Added Socket.IO event listeners for real-time message updates.
• Included error handling and validation checks.

Screenshots 📷

Type of change ☑️

I have added real-time-chat-app in nodejs project and mention that in readme and data.json

• New feature
• Database update
• Code style update (formatting, local variables)
• Bug fix
• Documentation update

Note to reviewers 📄

• Please review the real-time messaging functionality and Socket.IO event handling.
• Let me know if any improvements or optimizations are required.

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[Harshit457]

@Avdhesh-Varshney Please review this PR

[Harshit457]

@Avdhesh-Varshney Please Check now

[Harshit457]

@Avdhesh-Varshney Please review this I have to add one more PR