Update: websocket optimization

- Use protobuf
 - Eliminate unnecessary optimization logic
 - UART, sensor, status data transmitted as pb data

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>

main/service/webserver.h

@@ -4,13 +4,15 @@
 
 #ifndef ODROID_REMOTE_HTTP_WEBSERVER_H
 #define ODROID_REMOTE_HTTP_WEBSERVER_H
-#include "cJSON.h"
+
 #include "esp_http_server.h"
+#include <stddef.h>
+#include <stdint.h>
 
 void register_wifi_endpoint(httpd_handle_t server);
 void register_ws_endpoint(httpd_handle_t server);
 void register_control_endpoint(httpd_handle_t server);
-void push_data_to_ws(cJSON* data);
+void push_data_to_ws(const uint8_t* data, size_t len);
 void register_reboot_endpoint(httpd_handle_t server);
 esp_err_t change_baud_rate(int baud_rate);