add IamReadyToPlayCommand & refactoring

src/main/kotlin/eventDemo/configuration/ConfigureWebSocketsGameRoute.kt

@@ -0,0 +1,16 @@
+package eventDemo.configuration
+
+import eventDemo.app.command.gameSocket
+import eventDemo.app.event.GameEventBus
+import eventDemo.app.event.GameEventStream
+import io.ktor.server.application.Application
+import io.ktor.server.routing.routing
+
+fun Application.declareWebSocketsGameRoute(
+    eventStream: GameEventStream,
+    eventBus: GameEventBus,
+) {
+    routing {
+        gameSocket(eventStream, eventBus)
+    }
+}