Only allow console to shut down Geyser with a command

bootstrap/standalone/src/main/java/org/geysermc/platform/standalone/console/GeyserLogger.java

@@ -108,4 +108,9 @@ public class GeyserLogger extends SimpleTerminalConsole implements IGeyserLogger
     public void sendMessage(String message) {
         info(message);
     }
+
+    @Override
+    public boolean isConsole() {
+        return true;
+    }
 }