Documentation Update

[vvs-basanth]

Update the project documentation to include details about how quiz progress and high scores are tracked using localStorage. This will help other developers understand the implementation and maintain or extend the feature.

Tasks:

• Document the implementation of localStorage for progress and score tracking.
• Provide instructions for developers on maintaining or extending this feature.
• Update any user-facing documentation, if necessary.

Priority: Medium

Dependencies: Issue: Implement localStorage API for Quiz Progress, Issue: Implement localStorage API for Tracking High Scores.