Superuser Role

[danhunsaker]

We need a user account type that provides access to superuser capabilities.

• Superuser account type
• Superuser dashboard (separate from the user dashboard, so supers can also access user-level operations)
  • View superusers and normal users (as separate lists, so supers can be found quickly if needed)
• Ability to promote normal users to superusers, and demote superusers to normal users (via CLI)

Further functionality will be added by relevant issues.