FL-528 GUI: View, ViewDispather. Dolphin: first start. (#276)

* GUI: view. Flooper-blooper fix compilation error.
* GUI: view and viewdispatcher bones
* GUI: view implementation, view models, view dispatcher
* GUI: view navigation, model refinement. Power: use view, view dispatcher.
* HAL Flash: proper page write. Dolphin: views. Power: views
* Dolphin: transition idle scree to Views
* Dolphin: input events on stats view. Format sources.
* HAL: flash erase. Dolphin: permanent state storage.
* Dolphin: first start welcome. HAL: flash operation status, errata 2.2.9 crutch.

applications/gui/view_dispatcher_i.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "view_dispatcher.h"
+#include "view_i.h"
+#include <flipper_v2.h>
+#include <m-dict.h>
+
+DICT_DEF2(ViewDict, uint32_t, M_DEFAULT_OPLIST, View*, M_PTR_OPLIST)
+
+struct ViewDispatcher {
+    Gui* gui;
+    Widget* widget;
+    ViewDict_t views;
+    View* current_view;
+};
+
+/* Widget Draw Callback */
+void view_dispatcher_draw_callback(Canvas* canvas, void* context);
+
+/* Widget Input Callback */
+void view_dispatcher_input_callback(InputEvent* event, void* context);
+
+/* View to ViewDispatcher update event */
+void view_dispatcher_update(ViewDispatcher* view_dispatcher, View* view);