Naming and coding style convention, new linter tool. (#945)

* Makefile, Scripts: new linter
* About: remove ID from IC
* Firmware: remove double define for DIVC/DIVR
* Scripts: check folder names too. Docker: replace syntax check with make lint.
* Reformat Sources and Migrate to new file naming convention
* Docker: symlink clang-format-12 to clang-format
* Add coding style guide

firmware/targets/f7/ble_glue/app_debug.h

@@ -0,0 +1,38 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+  * File Name          : app_debug.h
+  * Description        : Header for app_debug.c module
+ ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under Ultimate Liberty license
+  * SLA0044, the "License"; You may not use this file except in compliance with
+  * the License. You may obtain a copy of the License at:
+  *                             www.st.com/SLA0044
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __APP_DEBUG_H
+#define __APP_DEBUG_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void APPD_Init(void);
+void APPD_EnableCPU2(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__APP_DEBUG_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/