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_debug/lfrfid_debug_app.cpp

@@ -0,0 +1,16 @@
+#include "lfrfid_debug_app.h"
+#include "scene/lfrfid_debug_app_scene_start.h"
+#include "scene/lfrfid_debug_app_scene_tune.h"
+
+LfRfidDebugApp::LfRfidDebugApp()
+    : scene_controller{this} {
+}
+
+LfRfidDebugApp::~LfRfidDebugApp() {
+}
+
+void LfRfidDebugApp::run() {
+    scene_controller.add_scene(SceneType::Start, new LfRfidDebugAppSceneStart());
+    scene_controller.add_scene(SceneType::TuneScene, new LfRfidDebugAppSceneTune());
+    scene_controller.process(100);
+}