Add event referees management and teams endpoint.

Introduced a new route for managing event referees with get, put, and delete operations. Also added an endpoint to fetch all teams, and integrated the referees routing into event configuration.

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

@@ -249,6 +249,7 @@ fun Route.configureEventsRoute() {
             configureEventTeams()
             configureEventGroups()
             configureEventRelations()
+            configureEventRefereesRouting()
         }
     }
 }