Zigbee example: add rcp and gateway

* provide Zigbee rcp and Zigbee gateway example
 * minor comment fix for light example

examples/zigbee/light_sample/light_switch/main/switch_driver.c

@@ -35,11 +35,11 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "switch_driver.h"
-#include <freertos/FreeRTOS.h>
-#include <freertos/task.h>
-#include "freertos/queue.h"
 #include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/queue.h"
+#include "switch_driver.h"
 
 /**
  * @brief: