Passwordless Core Profiler Auth - Update login & signup flow

[moon0326]

To enable passwordless login while ensuring backward compatibility for users who registered prior to the introduction of this feature, update the login/signup screen according to the new design.

FIgma: https://www.figma.com/design/Y5pUYSJPsGEud1vknUZhi8/Core-onboarding---Profiler?node-id=3183-8554&t=Xm9FR3eHbwWuWFBz-0

Acceptance criteria

Feature: Trigger Passwordless Login for Eligible Users

Scenario: Eligible user initiates passwordless login

Given a user is on the "One last step!" page
When the user clicks on the "Continue with email" button
And the user is identified as enrolled in the passwordless login feature
Then send a passwordless login email to the user
And display the "Check your email" page

Scenario: Non-passwordless user logs in

Given a user clicks "Continue" on the "Log in to your account" page
When the user is identified as having signed up before the passwordless feature was available
Then present a password input field
When the user enters their password and clicks "Continue"
Then process the login with the provided password

Current design

Updated designs