Implement localStorage API for Quiz Progress

[vvs-basanth]

Implement the localStorage API to save the user's current quiz state, including the current question index and selected answers. This will allow users to leave the quiz and return later to continue from where they left off.

Tasks:

• Create a function to save quiz progress in localStorage.
• Retrieve quiz progress from localStorage when the user returns to the quiz.
• Automatically clear progress from localStorage once the quiz is completed.

Priority: High

Dependencies: None