1. 添加StateSwitchListener

Author: LuSingTea

wechaty-puppet/src/main/kotlin/io/github/wechaty/status/StateListener.kt

@@ -0,0 +1,8 @@
+package io.github.wechaty.io.github.wechaty.status
+
+import io.github.wechaty.StateEnum
+
+@FunctionalInterface
+interface StateSwitchListener {
+    fun handler(state: StateEnum)
+}