feat: register minecraft theme slug

index.html

@@ -46,6 +46,9 @@
           <li role="option" data-value="animal-crossing" aria-selected="false">
             Animal Crossing
           </li>
+          <li role="option" data-value="minecraft" aria-selected="false">
+            Minecraft
+          </li>
         </ul>
       </label>
       <label class="design-theme language-switch">