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/rpc/rpc_cli.c

@@ -1,7 +1,7 @@
 #include <cli/cli.h>
 #include <furi.h>
 #include <rpc/rpc.h>
-#include <furi-hal.h>
+#include <furi_hal.h>
 
 typedef struct {
     Cli* cli;

applications/rpc/rpc_i.h

@@ -1,6 +1,6 @@
 #pragma once
 #include "rpc.h"
-#include "storage/filesystem-api-defines.h"
+#include "storage/filesystem_api_defines.h"
 #include <pb.h>
 #include <pb_decode.h>
 #include <pb_encode.h>

applications/rpc/rpc_storage.c

@@ -6,7 +6,7 @@
 #include "rpc/rpc.h"
 #include "rpc_i.h"
 #include "storage.pb.h"
-#include "storage/filesystem-api-defines.h"
+#include "storage/filesystem_api_defines.h"
 #include "storage/storage.h"
 #include <stdint.h>
 #include <lib/toolbox/md5.h>

applications/rpc/rpc_system.c

@@ -1,9 +1,9 @@
 #include "flipper.pb.h"
 #include "rpc_i.h"
 
-#include <furi-hal.h>
+#include <furi_hal.h>
 #include <power/power_service/power.h>
-#include <notification/notification-messages.h>
+#include <notification/notification_messages.h>
 
 void rpc_system_system_ping_process(const PB_Main* msg_request, void* context) {
     furi_assert(msg_request);