Creates a Form Field

curl --request POST \
  --url https://api.rootly.com/v1/form_fields \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "form_fields",
    "attributes": {
      "kind": "custom",
      "name": "<string>",
      "input_kind": "text",
      "value_kind": "inherit",
      "value_kind_catalog_id": "<string>",
      "description": "<string>",
      "shown": [
        "<string>"
      ],
      "required": [
        "<string>"
      ],
      "show_on_incident_details": true,
      "enabled": true,
      "default_values": [
        "<string>"
      ]
    }
  }
}
'

{
  "data": {
    "id": "1b8fe930-fdd3-493a-ad79-3543c9e64f96",
    "type": "form_fields",
    "attributes": {
      "team_id": 203,
      "slug": "test-custom-field",
      "kind": "custom",
      "input_kind": "text",
      "value_kind": "inherit",
      "value_kind_catalog_id": null,
      "name": "Test custom field",
      "description": null,
      "shown": [
        "web_new_incident_form"
      ],
      "required": [],
      "default_values": [],
      "show_on_incident_details": true,
      "enabled": true,
      "updated_at": "2025-12-22T14:53:42.094-08:00",
      "created_at": "2025-12-22T14:53:42.094-08:00"
    },
    "relationships": {
      "options": {
        "data": []
      },
      "positions": {
        "data": [
          {
            "id": "83db4ddf-8d25-4f94-9ff7-b89b667f5618",
            "type": "form_field_positions"
          }
        ]
      }
    }
  }
}