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/accessor/scene/accessor_scene_generic.h

@@ -1,5 +1,5 @@
 #pragma once
-#include "../accessor-app.h"
+#include "../accessor_app.h"
 
 class AccessorApp;
 

applications/accessor/scene/accessor_scene_start.cpp

@@ -1,8 +1,8 @@
-#include "../accessor-app.h"
-#include "../accessor-view-manager.h"
-#include "../accessor-event.h"
+#include "../accessor_app.h"
+#include "../accessor_view_manager.h"
+#include "../accessor_event.h"
 #include <callback-connector.h>
-#include "accessor-scene-start.h"
+#include "accessor_scene_start.h"
 
 void AccessorSceneStart::on_enter(AccessorApp* app) {
     AccessorAppViewManager* view_manager = app->get_view_manager();

applications/accessor/scene/accessor_scene_start.h

@@ -1,5 +1,5 @@
 #pragma once
-#include "accessor-scene-generic.h"
+#include "accessor_scene_generic.h"
 
 class AccessorSceneStart : public AccessorScene {
 public: