Add timed quiz with single-attempt and visual feedback

[AmeetkumarAK]

Overview

This pull request improves the quiz interaction mechanism by introducing time-based control, limiting user attempts, and enhancing visual feedback to create a more structured and reliable user experience.

Enhancements Included

1. Added a 10-second countdown timer to enforce timely responses
2. Implemented a single-attempt restriction to prevent repeated selections
3. Introduced visual feedback using glow effects:
4. Green highlight for correct selections
5. Red highlight for incorrect selections
6. Strengthened client-side logic to ensure consistent behavior across interactions

Technical Notes

Timer functionality implemented using JavaScript intervals
State management added to lock interactions after the first response
CSS classes dynamically applied for feedback without impacting existing styles
All changes are isolated to frontend logic and remain backward-compatible

Outcome
These enhancements make the quiz more engaging, predictable, and robust while preserving the original structure and intent of the project.