[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/u2f_app_i.h

@@ -0,0 +1,45 @@
+#pragma once
+
+#include "u2f_app.h"
+#include "scenes/u2f_scene.h"
+
+#include <gui/gui.h>
+#include <gui/view_dispatcher.h>
+#include <gui/scene_manager.h>
+#include <gui/modules/submenu.h>
+#include <dialogs/dialogs.h>
+#include <notification/notification-messages.h>
+#include <gui/modules/variable-item-list.h>
+#include "views/u2f_view.h"
+#include "u2f_hid.h"
+#include "u2f.h"
+
+typedef enum {
+    U2fCustomEventNone,
+
+    U2fCustomEventRegister,
+    U2fCustomEventAuth,
+    U2fCustomEventWink,
+
+    U2fCustomEventTimeout,
+
+    U2fCustomEventConfirm,
+
+} GpioCustomEvent;
+
+typedef enum {
+    U2fAppViewMain,
+} U2fAppView;
+
+struct U2fApp {
+    Gui* gui;
+    ViewDispatcher* view_dispatcher;
+    SceneManager* scene_manager;
+    NotificationApp* notifications;
+    osTimerId_t timer;
+    U2fHid* u2f_hid;
+    U2fView* u2f_view;
+    U2fData* u2f_instance;
+    GpioCustomEvent event_cur;
+    bool u2f_ready;
+};