Add newkit extension

Author: Folyd

docs/templates/index.html

@@ -172,6 +172,12 @@ <h3 class="text" style="text-align: center;">
                         JS Search Extension
                     </a>
                 </li>
+                <li style="margin-top: 0.5rem; margin-bottom: 0.5rem;">
+                    <a style="font-size: 0.875rem; line-height: 1.25rem; color: #9ca3af; text-decoration: none;"
+                        href="https://new.extension.sh" target="_parent">
+                        Newkit Extension
+                    </a>
+                </li>
             </ul>
         </div>
         <div style="align-self: flex-start;">