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/TestUnitLcd.h

@@ -0,0 +1,28 @@
+#pragma once
+#include "TestViewBase.h"
+#include <UnitLcd.h>
+#include <UnitPaHub.h>
+
+class TestUnitLcd final : public TestViewBase {
+public:
+    void onStart(lv_obj_t* parent, AppHandle handle, M5UnitTest* app) override;
+    void onStop() override;
+
+private:
+    UnitPaHub hub_;
+    UnitLcd   lcd_;
+    lv_obj_t* lblStatus_   = nullptr;
+    lv_obj_t* sliderBr_    = nullptr;
+    lv_obj_t* lblRotation_ = nullptr;
+    uint8_t   rotation_    = 0;
+    bool      usingPaHub_  = false;
+    uint8_t   lcdChannel_  = 0;
+
+    void selectIfNeeded();
+
+    static void onBrightnessChanged(lv_event_t* e);
+    static void onRotateClicked(lv_event_t* e);
+    static void onFillRedClicked(lv_event_t* e);
+    static void onFillBlueClicked(lv_event_t* e);
+    static void onWriteTextClicked(lv_event_t* e);
+};