Clean up JS API samples to be easier to use on startup (deephaven#4017)

web/client-api/src/main/java/io/deephaven/web/public/index.html

@@ -9,8 +9,6 @@
 Welcome to the Deephaven JS API. This page has the api loaded, open the browser console to interact with the server.
 <h2>Feature Demos</h2>
 <ul>
-<!--    <li><a href="grpc.html">Raw GRPC sample in JS</a></li>-->
-<!--    <li><a href="simple.html">JS API analog of the SimpleDeephavenClient</a></li>-->
     <li><a href="console.html">JS API analog of the ConsoleClient</a></li>
     <li><a href="table_basic.html">Create a table and display the contents</a></li>
     <li><a href="table_viewport.html">Create a table and display a viewport of it, with paging buttons</a></li>
@@ -23,11 +21,16 @@ <h2>Feature Demos</h2>
     <li><a href="totals_tables.html">Create totals, grand totals from an existing table</a></li>
     <li><a id="auth" href="authentication">Authentication samples</a></li>
 </ul>
-<script>
+<script type="module">
+    // If a PSK is specified in the URL, ensure that the auth link retains it
     var urlPsk = new URL(window.location).searchParams.get('psk');
     if (urlPsk) {
         document.getElementById('auth').href += "?psk=" + urlPsk;
     }
+
+    // Import the JS API and attach it to the window object for easier experimentation
+    import dh from './dh-core.js'
+    window.dh = dh;
 </script>
 </body>
 </html>