Add responsive navbar for better navigation

[lamaniaditya275-spec]

This are things i want to work on this
Convert the existing navbar into a responsive layout
Add a hamburger menu (toggle button) for mobile view
Implement show/hide functionality for navigation links
Ensure smooth transitions/animations for better UX

@Shriii19 could u assign me on this issue and ready to contribute tq.

[Shriii19]

@lamaniaditya275-spec you can start your don't forgot to sent make and new branch of your name and sent PR

[lamaniaditya275-spec]

Hi 👋

Could you please add an NSoC difficulty label (Level 1 / Level 2 / Level 3) to this issue?
It would help contributors better understand the complexity and plan accordingly.

Thanks!