[auth] Implement OTP to verify email during signup

[adityapawar1]

What's new in this PR

• Changes the email template to include a verification code
• Adds a new screen after sign-up
  • you can enter the verification code
  • you can resend the verification code (expires the previously sent code)

Relevant Links

None

Notion Sprint Task

Sprint Task

Online sources

https://supabase.com/docs/reference/javascript/auth-resend
https://supabase.com/docs/reference/javascript/auth-verifyotp?example=verify-signup-one-time-password%28otp%29

Related PRs

None

How to review

• Test verification email
  • Create a new account (you can use 10minutemail.net for a temp email)
  • Enter an invalid code
  • Enter the code sent to the email (should take you to the home screen)
  • Log out and log in with the new account to confirm it was verified
• Test Resend Code
  • Sign up, click resend code
  • Try entering the old code (should be invalid)
  • Enter the new code (should take you to home)
  • Log out and log in with the new account to confirm it was verified

Next steps

None

Tests Performed, Edge Cases

Above in how to review

Screenshots

Verification code screen:

CC: @akshaynthakur

[akshaynthakur]

Couple nits, make sure to fix routing so that verified email takes user to onboarding instead of home, but LGTM otherwise!

[akshaynthakur]

LGTM!