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/storage_processing.h

@@ -0,0 +1,16 @@
+#pragma once
+#include <furi.h>
+#include "storage.h"
+#include "storage_i.h"
+#include "storage_message.h"
+#include "storage_glue.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void storage_process_message(Storage* app, StorageMessage* message);
+
+#ifdef __cplusplus
+}
+#endif