feat: 🎸 add launchpad link to navbar

Author: JustinFeng

config/smart-layer/navbar.xml

@@ -119,6 +119,7 @@
       <ul class="navbar-nav">
 	      <li class="nav-item"><a class="nav-link" href="https://www.smartlayer.network">Home</a></li>
 	      <li class="nav-item"><a class="nav-link" href="https://www.smartlayer.network/technology">Technology</a></li>
+        <li class="nav-item external"><a class="nav-link" href="https://launchpad.smartlayer.network/" target="_blank">Launchpad</a></li>
         <li class="nav-item external"><a class="nav-link" href="https://document.smartlayer.network/">Docs</a></li>
       </ul>