Fix include order for compatibility

including the files in source file instead of header file fixed
'conflicting type' errors in idf macros when using newer version
ESP-IDF v4.4.4-148-g4c2afac355

main/guide-stepper.cpp

@@ -1,5 +1,21 @@
+extern "C"
+{
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "driver/adc.h"
+}
+
+#include "DendoStepper.h"
+#include "config.hpp"
 #include "guide-stepper.hpp"
 
+
+//---------------------
+//--- configuration ---
+//---------------------
+//also see config.hpp
 #define LEN_MOVE 90     //mm
 #define SPEED_MIN 5.0   //mm/s
 #define SPEED_MAX 110.0 //mm/s

main/guide-stepper.hpp

@@ -1,15 +1,4 @@
-extern "C"
-{
-#include <stdio.h>
-#include "DendoStepper.h"
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "esp_log.h"
-#include "driver/adc.h"
-}
-
-#include "config.hpp"
-
+#pragma once
 
 //task that initializes and controls the stepper motor
 //current functionality: