Created "main.h"

Added an main.h file in the inc directory. Holds stuff from the empty
project I made before.

inc/main.h

@@ -0,0 +1,24 @@
+/**
+  * @file: main.h
+  * @brief: Header for main.c file.
+  *This file contains the common defines of the application.
+  */
+
+#ifndef __MAIN_H
+#define __MAIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "stm32g0xx_hal.h"
+
+
+void Error_Handler(void);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MAIN_H */