[FL-1619] NFC long APDU emulation (#623)

* nfc: add apdu sequence exchange debug scene
* api-hal-gpio: fix GPIO initialization
* nfc: pull down nfc chip IRQ pin

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

applications/nfc/scenes/nfc_scene_emulate_apdu_sequence.c

@@ -0,0 +1,38 @@
+#include "../nfc_i.h"
+
+const void nfc_scene_emulate_apdu_sequence_on_enter(void* context) {
+    Nfc* nfc = (Nfc*)context;
+
+    // Setup view
+    Popup* popup = nfc->popup;
+
+    popup_set_header(popup, "Run APDU reader", 64, 31, AlignCenter, AlignTop);
+
+    // Setup and start worker
+
+    view_dispatcher_switch_to_view(nfc->view_dispatcher, NfcViewPopup);
+    nfc_worker_start(nfc->worker, NfcWorkerStateEmulateEMV, &nfc->dev.dev_data, NULL, nfc);
+}
+
+const bool nfc_scene_emulate_apdu_sequence_on_event(void* context, SceneManagerEvent event) {
+    Nfc* nfc = (Nfc*)context;
+
+    if(event.type == SceneManagerEventTypeTick) {
+        notification_message(nfc->notifications, &sequence_blink_blue_10);
+        return true;
+    }
+    return false;
+}
+
+const void nfc_scene_emulate_apdu_sequence_on_exit(void* context) {
+    Nfc* nfc = (Nfc*)context;
+
+    // Stop worker
+    nfc_worker_stop(nfc->worker);
+
+    // Clear view
+    Popup* popup = nfc->popup;
+    popup_set_header(popup, NULL, 0, 0, AlignCenter, AlignBottom);
+    popup_set_text(popup, NULL, 0, 0, AlignCenter, AlignTop);
+    popup_set_icon(popup, 0, 0, NULL);
+}