feat(api): Implemented session closed and kick event via websocket (#87)

Reviewed-on: #87
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/events/KickEvent.scala

@@ -0,0 +1,9 @@
+package events
+
+import model.users.User
+
+case class KickEvent(user: User) extends UserEvent(user) {
+  
+  override def id: String = "KickEvent"
+
+}

knockoutwhistweb/app/events/LeftEvent.scala

@@ -0,0 +1,9 @@
+package events
+
+import model.users.User
+
+case class LeftEvent(user: User) extends UserEvent(user) {
+
+  override def id: String = "LeftEvent"
+  
+}

knockoutwhistweb/app/events/LobbyUpdateEvent.scala

@@ -0,0 +1,9 @@
+package events
+
+import de.knockoutwhist.utils.events.SimpleEvent
+
+case class LobbyUpdateEvent() extends SimpleEvent {
+
+  override def id: String = "LobbyUpdateEvent"
+  
+}

knockoutwhistweb/app/events/UserEvent.scala

@@ -0,0 +1,12 @@
+package events
+
+import de.knockoutwhist.utils.events.SimpleEvent
+import model.users.User
+
+import java.util.UUID
+
+abstract class UserEvent(user: User) extends SimpleEvent {
+
+  def userId: UUID = user.id
+  
+}