Add service to get currency

AstonVictor → changed the visibility of the branch 3409504-add-service-to to hidden.

The MR was merged.

Implemented a new service with a few methods.
an example of usage:

  /** @var \Drupal\currency_taxonomy\CurrencyTaxonomyServiceInterface $service */
  $service = \Drupal::service('currency_taxonomy.service');
  $currency = $service->getCurrencyByCode('AFN');

Automatically closed - issue fixed for 2 weeks with no activity.