Email management views

[cdriehuys]

The endpoint /account/emails/ should allow for listing and creating new emails. The endpoint /account/emails/<id>/ should allow for retrieving or deleting a specific email.

The creation payload should be

{
  "address": <email-address>
}

The info payload returned should be

{
  "address": <email-address>,
  "id": <uuid>,
  "is_primary": <boolean>,
  "is_verified": <boolean>,
  "time_created": <date-time>,
  "time_updated": <date-time>,
}

Acceptance Criteria

1. Sending a GET request to the list endpoint should return a paginated list of emails.
2. Sending a POST request containing a new email address to the list endpoint should create a new unverified email address for the requesting user and send a verification email.
3. Sending a GET request to the detail endpoint should return the information for the specified email.
4. Sending a DELETE request to a non-primary email should delete the email.
5. Sending a DELETE request to the user's primary email address should fail.