Add a Presentation bundle class

Drupal core issue: https://www.drupal.org/node/2570593
Change record: https://www.drupal.org/node/3191609

modules/opd_presentations/opd_presentations.module

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+use Drupal\opd_presentations\Entity\Presentation;
+
+/**
+ * Implements hook_entity_bundle_info_alter().
+ *
+ * @param array<non-empty-string, array{class: non-empty-string}> $bundles
+ */
+function opd_presentations_entity_bundle_info_alter(array &$bundles): void {
+  if (isset($bundles['node'])) {
+    $bundles['node']['presentation']['class'] = Presentation::class;
+  }
+}