Save template of custom field

Would be great if you make a custom field, like an enum for eg: Environment: DEV, PROD or Locale: EN, DE, FR etc, and you would like to reuse this custom field in many of your custom models, and you could add this easily like a simple Text or any other default type of field.

In fact, this would be easy to make, but very very helpful in reusability.

Issue: https://forum.builder.io/t/save-custom-template-of-a-custom-field/1616