Build Manage Evaluators list page

[stepchud]

What/Why

This page allows challenge managers to add and delete evaluators from their challenges.

Figma Link

Manage Challenge Evaluators on Figma

Acceptance Criteria

• The top section of the page has an invite evaluator form
  • first_name, last_name, email are required
    • email format is validated -- Phx app uses this simple regex validate_format(:email, ~r/.+@.+\..+/)
• when an Evaluator is added to the list, create an EvaluatorInvitation only if there is no User record with that email address.
• If there is already a User record with evaluator role, they are added and ready to be assigned
• Delete button deletes the record from challenge_phases_users if they are already added, or deletes the evaluator_invitations if they have not accepted the invite yet.
• Delete button has a confirmation modal, shown in Figma
• When an evaluator has accepted the invitation and created a login.gov account, the Resend Invite link is removed from their entry and the status is "Awaiting Approval" instead of "Invite Sent"

Disregard the following if this work does not include any UI changes

• WAVE screenshot
• Automated a11y tests (axe-rspec specs)
• Keyboard accessibility (tab navigation, form interactions)
• Responsiveness at desktop and mobile

Out of Scope

The actual invitation email to new users is still WIP that will be added later.