App accessor: init (#433)

applications/accessor/scene/accessor-scene-start.h

@@ -0,0 +1,9 @@
+#pragma once
+#include "accessor-scene-generic.h"
+
+class AccessorSceneStart : public AccessorScene {
+public:
+    void on_enter(AccessorApp* app) final;
+    bool on_event(AccessorApp* app, AccessorEvent* event) final;
+    void on_exit(AccessorApp* app) final;
+};