List idea groups

{
  "data": [
    {
      "id": "string",
      "name": "string",
      "position": 0,
      "color": "string",
      "is_default": true,
      "workspace_id": "string",
      "created_at": "2019-08-24T14:15:22Z",
      "updated_at": "2019-08-24T14:15:22Z"
    }
  ]
}

{
  "error": {
    "code": "string",
    "message": "string",
    "details": {
      "property1": null,
      "property2": null
    }
  }
}