feat: RO/EN timeline translations, Facebook page link, real ACRIB history

- Create Despre ACRIB (RO, ID 69) and About ACRIB (EN, ID 70) as
  full translated versions of the timeline page
- Link all three via Polylang translation groups
- Update Nav RO/EN menus to point to correct translated timeline URLs
- Add Facebook page icon link to site footer (all pages)
- Add .acrib-footer-fb CSS to Kadence custom styles
- Timeline page: reverse chronological order (2026 newest → 2023 oldest)
- Three event photos uploaded to media library (Nostalgia, Atlas, Racoviță)
- All 10 milestones reflect real ACRIB history with press links

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

wp-content/mu-plugins/acrib-core.php

@@ -47,7 +47,8 @@ add_action('wp_footer', function () {
         <p class="acrib-footer-copyright">
           &copy; <?php echo $year; ?> <strong>ACRIB</strong> &mdash; Asociaci&oacute;n Casa Rom&acirc;neasc&#259; de las Islas Baleares
         </p>
-        <ul class="acrib-footer-legal-links">
+        <a class="acrib-footer-fb" href="https://www.facebook.com/profile.php?id=61583585888787" target="_blank" rel="noopener noreferrer" aria-label="ACRIB en Facebook"><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="currentColor"><path d="M24 12.073c0-6.627-5.373-12-12-12s-12 5.373-12 12c0 5.99 4.388 10.954 10.125 11.854v-8.385H7.078v-3.47h3.047V9.43c0-3.007 1.792-4.669 4.533-4.669 1.312 0 2.686.235 2.686.235v2.953H15.83c-1.491 0-1.956.925-1.956 1.874v2.25h3.328l-.532 3.47h-2.796v8.385C19.612 23.027 24 18.062 24 12.073z"/></svg></a>
+          <ul class="acrib-footer-legal-links">
           <li><a href="<?php echo esc_url($legal_url); ?>">Aviso Legal</a></li>
           <li><a href="<?php echo esc_url($pp_url); ?>">Privacidad</a></li>
           <li><a href="<?php echo esc_url($cookie_url); ?>">Cookies</a></li>