Add new boot logo screen

src/screens/BootLogoScreen.h

@@ -0,0 +1,9 @@
+#pragma once
+#include "Screen.h"
+
+
+class BootLogoScreen final : public Screen {
+public:
+  explicit BootLogoScreen(EpdRenderer* renderer): Screen(renderer) {}
+  void onEnter() override;
+};