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/rfid-writer.h

@@ -0,0 +1,19 @@
+#pragma once
+#include "stdint.h"
+
+class RfidWriter {
+public:
+    RfidWriter();
+    ~RfidWriter();
+    void start();
+    void stop();
+    void write_em(uint8_t em_data[5]);
+    void write_hid(uint8_t hid_data[3]);
+
+private:
+    void write_gap(uint32_t gap_time);
+    void write_bit(bool value);
+    void write_byte(uint8_t value);
+    void write_block(uint8_t page, uint8_t block, bool lock_bit, uint32_t data);
+    void write_reset();
+};