add remote source code (#12)

Co-authored-by: jyy <jiangyeying@m5stack.com>

remote/code/main/esp_now/esp_now_init.h

@@ -0,0 +1,23 @@
+#ifndef __ESP_NOW_INIT_H__
+#define __ESP_NOW_INIT_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "esp_err.h"
+#include <esp_mac.h>
+#include <espnow.h>
+#include <espnow_storage.h>
+#include <espnow_utils.h>
+#include "esp_wifi.h"
+
+void wifi_espnow_init(uint8_t channel);
+int wifi_espnow_reinit(uint8_t new_channel);
+void espnow_send_data(uint8_t *pkt, size_t len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif