Iclass UI (#1366)

* Move structs to header
* roll mbedtls into loclass
* Picopass with scene for reading card
* Picopass: fix memory leak
* Lib: return mbedtls back
* Picopass: rename symbols to match naming guide

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

applications/picopass/picopass_worker.h

@@ -0,0 +1,45 @@
+#pragma once
+
+#include "picopass_device.h"
+
+typedef struct PicopassWorker PicopassWorker;
+
+typedef enum {
+    // Init states
+    PicopassWorkerStateNone,
+    PicopassWorkerStateBroken,
+    PicopassWorkerStateReady,
+    // Main worker states
+    PicopassWorkerStateDetect,
+    // Transition
+    PicopassWorkerStateStop,
+} PicopassWorkerState;
+
+typedef enum {
+    // Reserve first 50 events for application events
+    PicopassWorkerEventReserved = 50,
+
+    // Picopass worker common events
+    PicopassWorkerEventSuccess,
+    PicopassWorkerEventFail,
+    PicopassWorkerEventNoCardDetected,
+
+    PicopassWorkerEventStartReading,
+} PicopassWorkerEvent;
+
+typedef void (*PicopassWorkerCallback)(PicopassWorkerEvent event, void* context);
+
+PicopassWorker* picopass_worker_alloc();
+
+PicopassWorkerState picopass_worker_get_state(PicopassWorker* picopass_worker);
+
+void picopass_worker_free(PicopassWorker* picopass_worker);
+
+void picopass_worker_start(
+    PicopassWorker* picopass_worker,
+    PicopassWorkerState state,
+    PicopassDeviceData* dev_data,
+    PicopassWorkerCallback callback,
+    void* context);
+
+void picopass_worker_stop(PicopassWorker* picopass_worker);