feat(ui): add main menu navbar and join game functionality (#35)

Reviewed-on: #35
Reviewed-by: lq64 <lq@blackhole.local>
Co-authored-by: Janis <janis.e.20@gmx.de>
Co-committed-by: Janis <janis.e.20@gmx.de>

knockoutwhistweb/app/views/ingame/ingame.scala.html

@@ -17,7 +17,7 @@
             @if(logic.getCurrentTrick.get.firstCard.isDefined) {
                 @util.WebUIUtils.cardtoImage(logic.getCurrentTrick.get.firstCard.get)
             } else {
-                @views.html.render.card.apply("../../../public/images/cards/1B.png")("Blank Card")
+                @views.html.render.card.apply("images/cards/1B.png")("Blank Card")
             }
         </div>
     </div>