Fixes and new apps (#30)

- M5 Unit Modules library + M5 Unit Test app
- Minor fixes for TodoList, TwoEleven, Snake, Brainfuck and Breakout
- Fixed SerialConsole to use the uart controller as it was broken in one of the many updates
- Fixed keyboard input in TwoEleven, Breakout, Magic8Ball and Snake
- Bluetooth Media Keys app, supports pressing physical keys to trigger the corresponding buttonmatrix button
- Epub Reader app

Apps/M5UnitTest/main/Source/TestUnitScroll.h

@@ -0,0 +1,29 @@
+#pragma once
+#include "TestViewBase.h"
+#include <UnitScroll.h>
+#include <UnitPaHub.h>
+
+class TestUnitScroll final : public TestViewBase {
+public:
+    void onStart(lv_obj_t* parent, AppHandle handle, M5UnitTest* app) override;
+    void onStop() override;
+
+private:
+    UnitPaHub   hub_;
+    UnitScroll  unit_;
+    lv_obj_t*   lblCounter_  = nullptr;
+    lv_obj_t*   lblButton_   = nullptr;
+    lv_obj_t*   lblLed_      = nullptr;
+    lv_obj_t*   sliderR_     = nullptr;
+    lv_obj_t*   sliderG_     = nullptr;
+    lv_obj_t*   sliderB_     = nullptr;
+    lv_timer_t* timer_       = nullptr;
+    int32_t     counter_     = 0;
+    bool        usingPaHub_  = false;
+
+    void selectIfNeeded();
+    static void onTimer(lv_timer_t* t);
+    static void onSliderChanged(lv_event_t* e);
+    void update();
+    void updateLedFromSliders();
+};