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/bad_usb/bad_usb_script.c

@@ -1,9 +1,9 @@
 #include <furi.h>
-#include <furi-hal.h>
+#include <furi_hal.h>
 #include <gui/gui.h>
 #include <input/input.h>
 #include <lib/toolbox/args.h>
-#include <furi-hal-usb-hid.h>
+#include <furi_hal_usb_hid.h>
 #include <storage/storage.h>
 #include "bad_usb_script.h"