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/cli/cli.c

@@ -1,7 +1,7 @@
 #include "cli_i.h"
 #include "cli_commands.h"
 
-#include <furi-hal-version.h>
+#include <furi_hal_version.h>
 #include <loader/loader.h>
 
 Cli* cli_alloc() {