refs #18012 [finc] move toc template to accessibility theme, add comments

themes/finc/templates/RecordTab/toc.phtml → themes/finc-accessibility/templates/RecordTab/toc.phtml

+<!-- finc-accessibility: RecordTab - toc -->
+<?php /**
+ *  copy of VuFind-version, adds empty lang-attribute to <li>s
+ */
+?>
+?>
 <?php
     // Set page title.
     $this->headTitle($this->translate('Table of Contents') . ': ' . $this->driver->getBreadcrumb());
@@ -26,3 +32,4 @@
 <?php else: ?>
   <?=$this->transEsc('Table of Contents unavailable')?>.
 <?php endif; ?>
+<!-- finc-accessibility: RecordTab - toc - END -->
\ No newline at end of file