[feature] Add support for user profiles API

[mlnm-capco]

Adds support for the following User Profile CRUD operations (documented here)

GET /api/v2/users/{user_id}/profiles
GET /api/v2/user_profiles/{profile_id}
GET /api/v2/user_profiles?identifier={identifier}
PUT /api/v2/users/{user_id}/profiles?identifier={identifier}
PUT /api/v2/user_profiles?identifier={identifier}
PUT /api/v2/user_profiles/{profile_id}
DELETE /api/v2/user_profiles/{profile_id}

[jamesforwardnwboxed]

This would be a great thing to have, @duemir @PierreBtz would you have an opportunity to get this reviewed soon? 🙌