List functionalities

curl --request GET \
  --url https://api.rootly.com/v1/functionalities \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "<string>",
      "type": "functionalities",
      "attributes": {
        "name": "<string>",
        "created_at": "<string>",
        "updated_at": "<string>",
        "slug": "<string>",
        "description": "<string>",
        "public_description": "<string>",
        "notify_emails": [
          "<string>"
        ],
        "color": "<string>",
        "backstage_id": "<string>",
        "external_id": "<string>",
        "pagerduty_id": "<string>",
        "opsgenie_id": "<string>",
        "opsgenie_team_id": "<string>",
        "cortex_id": "<string>",
        "service_now_ci_sys_id": "<string>",
        "position": 123,
        "environment_ids": [
          "<string>"
        ],
        "service_ids": [
          "<string>"
        ],
        "owner_group_ids": [
          "<string>"
        ],
        "owner_user_ids": [
          123
        ],
        "escalation_policy_id": "<string>",
        "slack_channels": [
          {
            "id": "<string>",
            "name": "<string>"
          }
        ],
        "slack_aliases": [
          {
            "id": "<string>",
            "name": "<string>"
          }
        ],
        "properties": [
          {
            "catalog_property_id": "<string>",
            "value": "<string>"
          }
        ]
      }
    }
  ],
  "links": {
    "self": "<string>",
    "first": "<string>",
    "prev": "<string>",
    "next": "<string>",
    "last": "<string>"
  },
  "meta": {
    "current_page": 123,
    "next_page": 123,
    "prev_page": 123,
    "total_count": 123,
    "total_pages": 123,
    "next_cursor": "<string>"
  },
  "included": [
    {
      "id": "<string>",
      "type": "<string>",
      "attributes": {},
      "relationships": {}
    }
  ]
}