[FL-2514] Port iButton application to C (#1198)

* Initial C iButton app setup
* Add more scenes
* Add even more scenes
* Add even more scenes again
* More scenes...
* Add key info scene
* Add delete success scene
* Use scene state to store internal data
* Add parameter parsing
* Add emulate scene
* Add write scene
* Add write success scene
* Add Read scene
* Add read success scene
* Add exit confirm scene
* Add retry confirm scene
* Add CRC error scene
* Add not key scene
* Add read key menu scene
* Rename some scenes
* Refactor conditionals
* Remove unneeded custom events
* Remove the old iButton app
* Correct formatting
* Remove rogue comments and function prototypes
* iButton: cleanup merge artifacts and fix warnings

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

applications/ibutton/scenes/ibutton_scene_select_key.c

@@ -0,0 +1,22 @@
+#include "../ibutton_i.h"
+
+void ibutton_scene_select_key_on_enter(void* context) {
+    iButton* ibutton = context;
+
+    if(!ibutton_file_select(ibutton)) {
+        scene_manager_search_and_switch_to_previous_scene(
+            ibutton->scene_manager, iButtonSceneStart);
+    } else {
+        scene_manager_next_scene(ibutton->scene_manager, iButtonSceneSavedKeyMenu);
+    }
+}
+
+bool ibutton_scene_select_key_on_event(void* context, SceneManagerEvent event) {
+    UNUSED(context);
+    UNUSED(event);
+    return false;
+}
+
+void ibutton_scene_select_key_on_exit(void* context) {
+    UNUSED(context);
+}