ISTWCMS-7275: Rename "publication" to "reference" in custom block.

Updated class and form names, admin labels, and text strings to replace "publication" with "reference" for consistency and clarity in the custom block functionality. This aligns terminology with its intended purpose.

src/Plugin/Block/UwCblPublicationSearch.php

@@ -11,11 +11,11 @@ use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
- * Custom block publication search.
+ * Custom block reference search.
  *
  * @Block(
  *   id = "uw_cbl_publication_search",
- *   admin_label = @Translation("Publication reference search"),
+ *   admin_label = @Translation("Reference search"),
  * )
  */
 class UwCblPublicationSearch extends BlockBase implements ContainerFactoryPluginInterface {
@@ -102,14 +102,14 @@ class UwCblPublicationSearch extends BlockBase implements ContainerFactoryPlugin
 
     // Get the reference search form using the options selected.
     $ref_search['form'] = $this->formBuilder->getForm(
-      'Drupal\uw_bibcite_reference\Form\PublicationSearchForm',
+      'Drupal\uw_bibcite_reference\Form\ReferenceSearchForm',
       $this->configuration,
     );
 
     // If there is no block title, then set the label so that
     // the template will know to place a visually hidden one.
     if (!$this->configuration['label_display']) {
-      $ref_search['label'] = $this->t('Publication reference search');
+      $ref_search['label'] = $this->t('Reference search');
     }
 
     return [