Add YouTube link to docs landing page nav bar

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

Author: sbryngelson

docs/index.html

@@ -156,6 +156,10 @@
                         <i class="pr-4 fa-solid fa-newspaper"></i>
                         <span class="flex-1">Papers</span>
                     </a>
+                    <a class="px-4 flex flex-row items-center py-4 border-b-2 hover:border-amber-400" href="https://www.youtube.com/@MFCode" target="_blank">
+                        <i class="pr-4 fa-brands fa-youtube"></i>
+                        <span class="flex-1">YouTube</span>
+                    </a>
                 </div>
             </div>
         </div>