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/cube/Inc/usbd_cdc_if.h

@@ -24,7 +24,7 @@
 #define __USBD_CDC_IF_H__
 
 #ifdef __cplusplus
- extern "C" {
+extern "C" {
 #endif
 
 /* Includes ------------------------------------------------------------------*/
@@ -49,8 +49,8 @@
   * @{
   */
 /* Define size for the receive and transmit buffer over CDC */
-#define APP_RX_DATA_SIZE  512
-#define APP_TX_DATA_SIZE  512
+#define APP_RX_DATA_SIZE 512
+#define APP_TX_DATA_SIZE 512
 /* USER CODE BEGIN EXPORTED_DEFINES */
 
 /* USER CODE END EXPORTED_DEFINES */