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/lfrfid/view/elements/generic_element.h

@@ -0,0 +1,21 @@
+#pragma once
+#include <gui/gui.h>
+#include <gui/view.h>
+
+class GenericElement {
+public:
+    GenericElement(){};
+    virtual ~GenericElement(){};
+    virtual void draw(Canvas* canvas) = 0;
+    virtual bool input(InputEvent* event) = 0;
+
+    // TODO that must be accessible only to ContainerVMData
+    void set_parent_view(View* view);
+
+    // TODO that must be accessible only to inheritors
+    void lock_model();
+    void unlock_model(bool need_redraw);
+
+private:
+    View* view = nullptr;
+};