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/Service/UwBlockAutoRender.php

@@ -668,13 +668,13 @@ class UwBlockAutoRender {
   }
 
   /**
-   * Function to get render array for publication references.
+   * Function to get a render array for references.
    *
    * @param array $config
    *   The block config.
    *
    * @return array
-   *   Render array for profiles.
+   *   Render an array for profiles.
    */
   private function getPublicationReferenceRenderArray(array $config): array {