Initialize command manager and ping passthrough before Geyser#start

bootstrap/viaproxy/src/main/java/org/geysermc/geyser/platform/viaproxy/GeyserViaProxyBootstrap.java

@@ -78,12 +78,13 @@ public class GeyserViaProxyBootstrap implements GeyserBootstrap {
         GeyserConfiguration.checkGeyserConfiguration(this.config, this.logger);
 
         this.geyser = GeyserImpl.load(PlatformType.VIAPROXY, this);
-        GeyserImpl.start();
 
         this.commandManager = new GeyserCommandManager(this.geyser);
         this.commandManager.init();
 
         this.pingPassthrough = GeyserLegacyPingPassthrough.init(this.geyser);
+
+        GeyserImpl.start();
     }
 
     @Override