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

knockoutwhistweb/app/assets/actor/KnockOutWebSocketActor.scala

@@ -1,21 +0,0 @@
-package actor
-
-import org.apache.pekko.actor.{Actor, ActorRef}
-import org.apache.pekko.http.scaladsl.model.ContentRange.Other
-
-
-class KnockOutWebSocketActor(
-                              out: ActorRef,
-                            ) extends Actor {
-    def receive: Receive = {
-      case msg: String =>
-        out ! s"Received your message: ${msg}"
-      case other: Other =>
-        println(s"Received unknown message: $other")
-    }
-
-    def sendJsonToClient(json: String): Unit = {
-      println("Received event from Controller")
-      out ! json
-    }
-}