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/view_modules/generic_view_module.h

@@ -0,0 +1,10 @@
+#pragma once
+#include <gui/view.h>
+
+class GenericViewModule {
+public:
+    GenericViewModule(){};
+    virtual ~GenericViewModule(){};
+    virtual View* get_view() = 0;
+    virtual void clean() = 0;
+};