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/archive/helpers/archive_favorites.h

@@ -1,5 +1,5 @@
 #pragma once
-#include "file-worker.h"
+#include "file_worker.h"
 
 #define ARCHIVE_FAV_PATH "/any/favorites.txt"
 #define ARCHIVE_FAV_TEMP_PATH "/any/favorites.tmp"

applications/archive/helpers/archive_files.h

@@ -1,5 +1,5 @@
 #pragma once
-#include "file-worker.h"
+#include "file_worker.h"
 
 #define MAX_FILES 100 //temp