Add Back Button and Password Visibility Toggle to Sign-Up/Login Pages

[PriyaIngle7]

I would like to work on enhancing the Sign-Up/Login Page by adding a "Back" button and a password visibility toggle (Users cannot see what they are typing into the password field, which can be inconvenient when trying to confirm the correct password input)
as these features would improve navigation and usability.

Additionally, I plan to improve the UI for a better user experience.

@vishal02527 Could you please assign me this issue under the gssoc-ext, hacktoberfest-accepted, and level labels?

Thank you, and I look forward to contributing!