Support wire-server "rich profiles"

[fisx]

For wire-server, we may need rich profiles:

      { ...,
        "urn:wire:scim:schemas:profile:1.0": {
          "richInfo": {
            "version": 0,
            "fields": [
              {
                "value": "hair color",
                "type": "green"
              },
              {
                "value": "title",
                "type": "galactic overlord"
              }
            ]
          }
        },
        "urn:ietf:params:scim:schemas:extension:wire:1.0:User": {
          "hair color": "green",
          "title": "galactic overlord"
        },
        ...
      }