Title: Improve handleMessage in socketController.js

[sagnik3788]

Describe your issue.

We can improve the handleMessage code by implementing the following enhancements:
Checks if the message data is correct before doing anything with it
Efficiently broadcasts the message to all chat participants except the sender.
Includes error handling to handle exceptions gracefully.
Add comments.
@varunKT001 I'd like to work on this issue. Can it be assigned to me?

Screenshots (if applicable).

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Additional context (if any)

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[github-actions]

Hey @sagnik3788 👋, thank you for raising an issue. Please make sure that it is detailed, and also following the provided template.

[varunKT001]

@sagnik3788 Sure, go ahead 🚀