Add "Back to Top" Scroll Button in README

[T-Fathima]

Description: Add a "Back to Top" button in the README to improve navigation, especially for readers scrolling through long sections. This button will allow users to quickly scroll back to the top of the README without manually scrolling up.

I would like to work on it.
Please assign it to me if it's a requirement.
Thank you.

[github-actions]

Hello T-Fathima, Thanks for opening an issue, your contribution is valuable to us. The maintainers will review this issue and provide feedback as soon as possible.