[FEATURE] Add a scroll-to-top button for easier navigation through the website

Summary

I want to add a scroll-to-top button to the website. One that appears when you scroll down slightly and can take you back to the top of the website on clicking.

Motivation

When the number of algorithms increases, scroll back to the top after having scrolled to the bottom can be tedious. A scroll-to-top button can help

Detailed Description

I scroll-to-top button is simple but effective. I have clearly described what I plan to implement.

Screenshots/Mockups (if applicable)

backtotop

Additional Context

No response

Existing Issues

[X] I have checked existing issues (open and closed) for duplicates

Alternatives Considered