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/irda/irda_app_event.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <irda.h>
+#include <gui/modules/dialog_ex.h>
+
+class IrdaAppEvent {
+public:
+    enum class Type : uint8_t {
+        Tick,
+        Exit,
+        Back,
+        MenuSelected,
+        MenuSelectedPress,
+        MenuSelectedRelease,
+        DialogExSelected,
+        NextScene,
+        IrdaMessageReceived,
+        TextEditDone,
+        PopupTimer,
+        ButtonPanelPressed,
+    };
+
+    union {
+        int32_t menu_index;
+        DialogExResult dialog_ex_result;
+    } payload;
+
+    Type type;
+};