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_i.h

@@ -0,0 +1,29 @@
+#pragma once
+#include <furi.h>
+#include <gui/gui.h>
+#include "storage_glue.h"
+#include "storage_sd_api.h"
+#include "filesystem_api_internal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define STORAGE_COUNT (ST_INT + 1)
+
+typedef struct {
+    ViewPort* view_port;
+    bool enabled;
+} StorageSDGui;
+
+struct Storage {
+    osMessageQueueId_t message_queue;
+    StorageData storage[STORAGE_COUNT];
+    StorageStatus prev_ext_storage_status;
+    StorageSDGui sd_gui;
+    FuriPubSub* pubsub;
+};
+
+#ifdef __cplusplus
+}
+#endif