Need a pop up menu when time is up

[ayushranjann]

Description:
As part of enhancing the user experience in our Multiplayer Typing WebApp, we propose the addition of a "Time's Up" popup notification. This feature is crucial to notify users when their typing challenge has concluded, providing a clear and engaging signal for the end of the game.

Details:

• When the time limit for a typing challenge expires, users should see a visually appealing and informative popup.
• The popup should include a friendly message, thanking users for their participation and encouraging them to review their scores.
• Integration with Socket.io should ensure the seamless display of the popup for all users in real-time.
• Consider customization options for the popup content, such as branding and styling.