Improved Visibility: Implemented a toggle button that switches between dark mode and light mode on the sign-up page

[sarahannie]

Improved Visibility: Implemented a toggle button that switches between dark mode and light mode on the sign-up page

Summary

Implemented a toggle button that, upon clicking, switches between dark mode and light mode on the signup page.

Motivation

this fix open issue of #819 dark mode on the website

Testing

Yes, it has been tested

for light mode

for dark mode