add: IO TODO

src/main/java/com/iflytop/gd/hardware/controller/IOController.java

@@ -0,0 +1,5 @@
+package com.iflytop.gd.hardware.controller;
+
+// TODO:
+public class IOController {
+}

src/main/java/com/iflytop/gd/hardware/service/IOService.java

@@ -0,0 +1,5 @@
+package com.iflytop.gd.hardware.service;
+
+// TODO:
+public class IOService {
+}