message: Fix export type of `ScaffolderFieldExtensions`
diff: export { scaffolderApiRef, ScaffolderClient } from './api';
  export type { ScaffolderApi } from './api';
  -export { createScaffolderFieldExtension } from './extensions';
  -export type {
  +export {
  + createScaffolderFieldExtension,
  ScaffolderFieldExtensions,
  - CustomFieldValidator,
  - FieldExtensionOptions,
  } from './extensions';
  +export type { CustomFieldValidator, FieldExtensionOptions } from './extensions';
  export {
  EntityPickerFieldExtension,
  OwnerPickerFieldExtension,
  