Creates a custom form

curl --request POST \
  --url https://api.rootly.com/v1/custom_forms \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "custom_forms",
    "attributes": {
      "name": "<string>",
      "command": "<string>",
      "slug": "<string>",
      "description": "<string>",
      "enabled": true
    }
  }
}
'

{
  "data": {
    "id": "5bba06dc-ab16-45c9-bccf-65eaf3ffd432",
    "type": "custom_forms",
    "attributes": {
      "slug": "test",
      "name": "Test",
      "description": null,
      "enabled": true,
      "command": "test",
      "created_at": "2025-12-19T07:41:24.228-08:00",
      "updated_at": "2025-12-19T07:41:24.228-08:00"
    }
  }
}