ui_icons-1.0.x-dev/modules/ui_icons_field/ui_icons_field.module

<?php

/**
 * @file
 * Drupal UI Icons Field.
 */

declare(strict_types=1);

/**
 * Implements hook_config_schema_info_alter().
 */
function ui_icons_field_config_schema_info_alter(array &$definitions): void {
  if (!isset($definitions['field.value.link']['mapping']['options']['mapping'])) {
    return;
  }

  $definitions['field.value.link']['mapping']['options']['mapping']['icon'] = [
    'type' => 'field.value.ui_icon',
  ];
  $definitions['field.value.link']['mapping']['options']['mapping']['icon_display'] = [
    'type' => 'string',
    'label' => 'Icon display position',
  ];
}