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

applications/gpio/usb_uart_bridge.c

@@ -1,7 +1,7 @@
 #include "usb_uart_bridge.h"
-#include "furi-hal.h"
+#include "furi_hal.h"
 #include <stream_buffer.h>
-#include <furi-hal-usb-cdc_i.h>
+#include <furi_hal_usb_cdc_i.h>
 #include "usb_cdc.h"
 
 #define USB_CDC_PKT_LEN CDC_DATA_SZ