feat(websocket)!: Implement WebSocket connection and event handling

knockoutwhistweb/app/views/main.scala.html

@@ -25,6 +25,7 @@
     </body>
     <script src="@routes.JavaScriptRoutingController.javascriptRoutes()" type="text/javascript"></script>
     <script src="@routes.Assets.versioned("javascripts/main.js")" type="text/javascript"></script>
+    <script src="@routes.Assets.versioned("javascripts/ingame.js")" type="text/javascript"></script>
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@@5.3.8/dist/js/bootstrap.bundle.min.js" integrity="sha384-FKyoEForCGlyvwx9Hj09JcYn3nv7wiPVlz7YYwJrWVcXK/BmnVDxM+D2scQbITxI" crossorigin="anonymous"></script>
     <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
 </html>