Add Timer to Game

[aref-asadi]

Description

Implement a timer to create a time-based challenge, requiring players to guess the correct number within a limited time. This feature will add excitement and urgency to the gameplay, especially on higher difficulty levels.

Proposed Functionality:

• Display a countdown timer in the game window that starts when the game begins.
• Allow users to set or select a time limit (e.g., 30 seconds, 60 seconds) based on difficulty level.
• If the timer reaches zero, display a message indicating that the time has run out and provide an option to restart the game.

Benefits

• Adds an extra layer of challenge and engagement, encouraging quicker guesses.
• Makes the game suitable for time-based competitions or quick-play sessions.

Additional Notes

Consider providing a visual cue (e.g., color change) as time runs low to alert the player.

[BDadmehr0]

Assignee me

[aref-asadi]

perfect @BDadmehr0

[BDadmehr0]

https://github.com/aref-asadi/number_guessing_game/pull/6