Document the difference with Drupal\views\Plugin\views\field\EntityLabel

Problem/Motivation

Drupal core provides an entity label views field: Drupal\views\Plugin\views\field\EntityLabel. By default it's only enabled for File usage, but it can easily be re-used for other entity types by referencing it in views_field_entity_label_views_data instead of the custom views field in this module.

Proposed resolution

If the core views field is good enough, start using it here. If not, consider documenting the differences in the project description.