[FL-1958] U2F prototype (#879)

* U2F implementation prototype
* U2F data encryption and store, user confirmation request
* remove debug prints
* fix notification bug in chrome
* split u2f_alloc into u2f_init and u2f_alloc
* typo fix, furi-hal-trng -> furi-hal-random
* rand/srand redefinition
* SubGhz: a little bit of Dante.
* u2f_data naming fix

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

applications/u2f/views/u2f_view.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <gui/view.h>
+
+typedef struct U2fView U2fView;
+typedef void (*U2fOkCallback)(InputType type, void* context);
+
+typedef enum {
+    U2fMsgNone,
+    U2fMsgRegister,
+    U2fMsgAuth,
+    U2fMsgError,
+} U2fViewMsg;
+
+U2fView* u2f_view_alloc();
+
+void u2f_view_free(U2fView* u2f);
+
+View* u2f_view_get_view(U2fView* u2f);
+
+void u2f_view_set_ok_callback(U2fView* u2f, U2fOkCallback callback, void* context);
+
+void u2f_view_set_state(U2fView* u2f, U2fViewMsg msg);