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/subghz/subghz_i.h

@@ -11,11 +11,11 @@
 #include "views/subghz_test_packet.h"
 
 #include <furi.h>
-#include <furi-hal.h>
+#include <furi_hal.h>
 #include <gui/gui.h>
 #include <dialogs/dialogs.h>
 #include <gui/scene_manager.h>
-#include <notification/notification-messages.h>
+#include <notification/notification_messages.h>
 #include <gui/view_dispatcher.h>
 #include <gui/modules/submenu.h>
 #include <gui/modules/popup.h>
@@ -30,7 +30,7 @@
 #include <lib/subghz/protocols/subghz_protocol_common.h>
 #include "subghz_history.h"
 
-#include <gui/modules/variable-item-list.h>
+#include <gui/modules/variable_item_list.h>
 
 #define SUBGHZ_TEXT_STORE_SIZE 40