List escalation policies

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

{
  "data": [
    {
      "id": "<string>",
      "attributes": {
        "name": "<string>",
        "repeat_count": 123,
        "created_by_user_id": 123,
        "description": "<string>",
        "last_updated_by_user_id": 123,
        "group_ids": [
          "<string>"
        ],
        "service_ids": [
          "<string>"
        ],
        "business_hours": {
          "days": [],
          "start_time": "<string>",
          "end_time": "<string>"
        },
        "created_at": "<string>",
        "updated_at": "<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>"
  }
}