Retrieves a custom form

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

{
  "data": {
    "id": "ef0545cf-478d-460f-8306-9daf2b9525c5",
    "type": "custom_forms",
    "attributes": {
      "slug": "id-dolorem-explicabo-sint",
      "name": "Id dolorem explicabo sint.",
      "description": "Rerum libero et ut.",
      "enabled": true,
      "command": "id-dolorem-explicabo-sint",
      "created_at": "2026-01-29T05:24:23.681-08:00",
      "updated_at": "2026-01-29T05:24:23.681-08:00"
    }
  }
}