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/u2f/u2f_data.c

@@ -1,8 +1,8 @@
 #include <furi.h>
 #include "u2f_hid.h"
-#include <furi-hal.h>
+#include <furi_hal.h>
 #include <storage/storage.h>
-#include <furi-hal-random.h>
+#include <furi_hal_random.h>
 #include <flipper_file.h>
 
 #define TAG "U2F"