Adding user is typing feature

[Yassa-hue]

Feature: User Is Typing Indicator

This pull request implements a new feature that displays a "user is typing" indicator in the chat interface. The indicator informs users in the same chat room when someone is actively typing a message.

Changes Made:

• On the server side, added a new event called "typing" to listen for changes in the message input field.
• When a user starts typing, the server broadcasts the username of the typing user to all users in the same chat room.
• On the client side, registered an event handler for the "typing" event.
• Compared the received username with the current user's username.
• Displayed the typing user's name at the infobar if the usernames don't match.
• Implemented a setTimeout function to clear the typing indicator after a duration of 1 second.
• Cleared any existing timeouts when a new "typing" event is received to prevent premature removal of the typing message.

Additional Details:

• This feature enhances the user experience by providing real-time feedback when someone is typing in the chat room.
• The implementation ensures that the typing indicator does not persist indefinitely by clearing it after a brief delay.
• The user interface remains responsive to multiple typing events and handles them gracefully.

Testing:

• Thoroughly tested the feature by simulating various scenarios, including multiple users typing simultaneously and rapid succession of typing events.
• Verified that the typing indicator appears correctly for the relevant users and is cleared after the specified duration.
• Ensured that the feature maintains consistency and gracefully handles edge cases such as users joining or leaving the chat room during typing events.

Thank you for considering this pull request. I am open to feedback and suggestions for further improvements.