feat: add nav bar

packages/analytics/views/layouts/main.handlebars

@@ -4,6 +4,12 @@
     <link rel='stylesheet' href='/css/style.css' />
   </head>
   <body>
+    <nav>
+      <ul>
+        <li><a href='/'>Home</a></li>
+        <li><a href='/users'>Users</a></li>
+      </ul>
+    </nav>
     {{{body}}}
   </body>
 </html>