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

lib/app-scened-template/generic_scene.hpp

@@ -0,0 +1,9 @@
+template <typename TApp> class GenericScene {
+public:
+    virtual void on_enter(TApp* app, bool need_restore) = 0;
+    virtual bool on_event(TApp* app, typename TApp::Event* event) = 0;
+    virtual void on_exit(TApp* app) = 0;
+    virtual ~GenericScene(){};
+
+private:
+};