Feature request: Add sign up button

[Maheen-Zahid]

Prerequisites

• I have searched the repository’s issues and Kinde community to ensure my feature request isn’t a duplicate
• I have read the contributing guidelines
• I agree to the terms in the code of conduct

What is the problem you’re trying to solve?

In Ruby Starterkit we don't have any sign up button and sign up funcationality

What solution would you like to see?

There should be a sign up button with sign in button

Additional information

No response