List shifts

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

{
  "data": [
    {
      "id": "b15f50c6-b57a-58f4-b251-35ec02e448a7",
      "type": "shifts",
      "attributes": {
        "schedule_id": "cdda987f-5f3a-4bf0-850f-74ec8faa20f0",
        "rotation_id": "f25fecd5-5be0-41f0-99d7-7528aed789de",
        "starts_at": "2024-07-02T21:00:00.000-07:00",
        "ends_at": "2024-07-02T23:00:00.000-07:00",
        "is_override": true
      },
      "relationships": {
        "shift_override": {
          "data": null
        },
        "user": {
          "data": {
            "id": "513",
            "type": "users"
          }
        }
      }
    },
    {
      "id": "3c8d68ef-49b0-5201-9211-53656b98f204",
      "type": "shifts",
      "attributes": {
        "schedule_id": "cdda987f-5f3a-4bf0-850f-74ec8faa20f0",
        "rotation_id": "96dca411-8693-4223-9357-8a6a542c3082",
        "starts_at": "2024-07-02T19:00:00.000-07:00",
        "ends_at": "2024-07-02T21:00:00.000-07:00",
        "is_override": false
      },
      "relationships": {
        "shift_override": {
          "data": null
        },
        "user": {
          "data": {
            "id": "513",
            "type": "users"
          }
        }
      }
    }
  ]
}