[FL-2245] Introduce Mifare Classic Emulation (#1242)

* digital signal: introduce digital signal
* nfca: add nfca signal encoder
* nfc: add mifare classic emulation scene
* nfca: add classic emulation support to lib and hal
* mifare classic: support basic read commands
* nfc: add mifare classic menu scene
* mifare classic: start parsing commands in emulation
* mifare classic: add nested auth
* nfc: fix errors
* mifare classic: add encrypt function
* nfc: fix mifare classic save
* lib hex: add hex uint64_t ASCII parser
* flipper format: add uint64 hex format support
* nfc: add mifare classic key map
* nfc: hide mifare classic keys on emulation
* mifare classic: add NACK responce
* nfc: add partial bytes support in transparent mode
* nfc: mifare classic add shadow file support
* digital signal: move arr buffer from BSS to heap
* mifare classic: process access bits more careful
* nfca: fix memory leack
* nfc: format sources
* mifare classic: cleun up

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

lib/digital_signal/digital_signal.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#include <furi_hal_gpio.h>
+
+typedef struct {
+    bool start_level;
+    uint32_t edge_cnt;
+    uint32_t edges_max_cnt;
+    float* edge_timings;
+    uint32_t* reload_reg_buff;
+} DigitalSignal;
+
+DigitalSignal* digital_signal_alloc(uint32_t max_edges_cnt);
+
+void digital_signal_free(DigitalSignal* signal);
+
+bool digital_signal_append(DigitalSignal* signal_a, DigitalSignal* signal_b);
+
+bool digital_signal_get_start_level(DigitalSignal* signal);
+
+uint32_t digital_signal_get_edges_cnt(DigitalSignal* signal);
+
+float digital_signal_get_edge(DigitalSignal* signal, uint32_t edge_num);
+
+bool digital_signal_send(DigitalSignal* signal, const GpioPin* gpio);