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/ibutton/scene/ibutton_scene_add_value.h

@@ -0,0 +1,14 @@
+#pragma once
+#include "ibutton_scene_generic.h"
+#include "../ibutton_key.h"
+
+class iButtonSceneAddValue : public iButtonScene {
+public:
+    void on_enter(iButtonApp* app) final;
+    bool on_event(iButtonApp* app, iButtonEvent* event) final;
+    void on_exit(iButtonApp* app) final;
+
+private:
+    void byte_input_callback(void* context);
+    uint8_t new_key_data[IBUTTON_KEY_DATA_SIZE] = {};
+};