Migrate Event class to Kotlin and update references across modules

Signed-off-by: Chaoscaot <max@maxsp.de>

WebsiteBackend/src/de/steamwar/routes/Events.kt

@@ -231,7 +231,7 @@ fun Route.configureEventsRoute() {
                     }
                 }
                 event.update(eventName, deadline, start, end, schemType, maxTeamMembers, publicSchemsOnly)
-                call.respond(ResponseEvent(Event.get(event.eventID)))
+                call.respond(ResponseEvent(Event.byId(event.eventID)!!))
             }
             delete {
                 val id = call.parameters["id"]?.toIntOrNull()
@@ -239,7 +239,7 @@ fun Route.configureEventsRoute() {
                     call.respond(HttpStatusCode.BadRequest, ResponseError("Invalid ID"))
                     return@delete
                 }
-                val event = Event.get(id)
+                val event = Event.byId(id)
                 if (event == null) {
                     call.respond(HttpStatusCode.NotFound, ResponseError("Event not found"))
                     return@delete
@@ -263,7 +263,7 @@ suspend fun ApplicationCall.receiveEvent(fieldName: String = "id"): Event? {
         return null
     }
 
-    val event = Event.get(eventId)
+    val event = Event.byId(eventId)
     if (event == null) {
         respond(HttpStatusCode.NotFound, ResponseError("Event not found"))
         return null