Trivia.jsx : Add Timer per Question + Bonus Points for Speed

Implement a timer per question to make the quiz more challenging and engaging. Players earn bonus points for answering quickly within the time limit.

Acceptance Criteria:

Add a countdown timer (e.g., 15 seconds per question).

If the timer reaches 0, automatically lock the question and move to the next one.

Award extra points for answering before half of the time runs out.

Display remaining time visually (progress bar or countdown number).

Bonus:
Persist the timer visually using React state and ensure it resets when moving to the next question.