New LF-RFID app (#534)

* Hal lfrfid: add read timer pulse and period config fns
* New debug application for lfrfid subsystem
* New lfrfid: app, fix naming
* App lfrfid: assets
* Container view module
* App ibutton: remove unused header
* App lfrfid scenes
* App notification, add yield to blocking operations, add speaker volume control
* App lfrfid: reading key scene
* Assets: placeholder icon
* App lfrfid: reworked container view module
* App lfrfid: new scenes
* App lfrfid: write scene
* App lfrfid: write hid
* App lfrfid: emulate scene
* App lfrfid: save name scene
* App lfrfid: add missing file

applications/lfrfid/helpers/state-sequencer.h

@@ -0,0 +1,25 @@
+#pragma once
+#include "stdint.h"
+#include <list>
+#include <functional>
+
+class TickSequencer {
+public:
+    TickSequencer();
+    ~TickSequencer();
+
+    void tick();
+    void reset();
+    void clear();
+
+    void do_every_tick(uint32_t tick_count, std::function<void(void)> fn);
+    void do_after_tick(uint32_t tick_count, std::function<void(void)> fn);
+
+private:
+    std::list<std::pair<uint32_t, std::function<void(void)> > > list;
+    std::list<std::pair<uint32_t, std::function<void(void)> > >::iterator list_it;
+
+    uint32_t tick_count;
+
+    void do_nothing();
+};