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/storage_settings/storage_settings.h

@@ -4,14 +4,14 @@
 #include <gui/view.h>
 #include <gui/view_dispatcher.h>
 #include <gui/scene_manager.h>
-#include <notification/notification-messages.h>
+#include <notification/notification_messages.h>
 
 #include <gui/modules/submenu.h>
 #include <gui/modules/dialog_ex.h>
 #include <gui/modules/popup.h>
 
 #include <storage/storage.h>
-#include <storage/storage-sd-api.h>
+#include <storage/storage_sd_api.h>
 
 #include "scenes/storage_settings_scene.h"