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/storages/sd_notify.c

@@ -1,4 +1,4 @@
-#include "sd-notify.h"
+#include "sd_notify.h"
 
 static const NotificationSequence sd_sequence_success = {
     &message_green_255,

applications/storage/storages/sd_notify.h

@@ -1,6 +1,6 @@
 #pragma once
 #include <furi.h>
-#include <notification/notification-messages.h>
+#include <notification/notification_messages.h>
 
 #ifdef __cplusplus
 extern "C" {

applications/storage/storages/storage_ext.c

@@ -1,9 +1,9 @@
 #include "fatfs.h"
-#include "../filesystem-api-internal.h"
-#include "storage-ext.h"
-#include <furi-hal.h>
-#include "sd-notify.h"
-#include <furi-hal-sd.h>
+#include "../filesystem_api_internal.h"
+#include "storage_ext.h"
+#include <furi_hal.h>
+#include "sd_notify.h"
+#include <furi_hal_sd.h>
 
 typedef FIL SDFile;
 typedef DIR SDDir;

applications/storage/storages/storage_ext.h

@@ -1,7 +1,7 @@
 #pragma once
 #include <furi.h>
-#include "../storage-glue.h"
-#include "../storage-sd-api.h"
+#include "../storage_glue.h"
+#include "../storage_sd_api.h"
 
 #ifdef __cplusplus
 extern "C" {

applications/storage/storages/storage_int.c

@@ -1,6 +1,6 @@
-#include "storage-int.h"
+#include "storage_int.h"
 #include <lfs.h>
-#include <furi-hal.h>
+#include <furi_hal.h>
 
 #define TAG "StorageInt"
 #define STORAGE_PATH "/int"

applications/storage/storages/storage_int.h

@@ -1,6 +1,6 @@
 #pragma once
 #include <furi.h>
-#include "../storage-glue.h"
+#include "../storage_glue.h"
 
 #ifdef __cplusplus
 extern "C" {