Spam overlay for profile

[thieflord06]

Like the spam overlay on lists, add a spam overlay for the profile page.

endpoint: /api/v1/anon/overlays/profile/spam/{identifier}

[thieflord06]

Pending #40

[thieflord06]

This might be blocked by #40

As an interim the default tab that an account is taken to is "blocking", we can use that as a placeholder.

[thieflord06]

@jattiman