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/TestUnitByteButton.h

@@ -0,0 +1,29 @@
+#pragma once
+#include "TestViewBase.h"
+#include <UnitByteButton.h>
+#include <UnitPaHub.h>
+
+class TestUnitByteButton final : public TestViewBase {
+public:
+    void onStart(lv_obj_t* parent, AppHandle handle, M5UnitTest* app) override;
+    void onStop() override;
+
+private:
+    static constexpr int      BTN_COUNT       = UnitByteButton::BUTTON_COUNT;
+    static constexpr uint32_t COLOR_OFF       = 0x001100;
+    static constexpr uint32_t COLOR_ON        = 0x00FF44;
+    static constexpr uint32_t COLOR_ERROR     = 0x440000;
+    static constexpr uint32_t COLOR_PRESSED   = 0xFFFF00;
+
+    UnitPaHub      hub_;
+    UnitByteButton unit_;
+    lv_obj_t*   indicators_[BTN_COUNT] = {};
+    lv_timer_t* timer_                 = nullptr;
+    uint32_t    ledColors_[BTN_COUNT]  = {};
+    bool        prevPressed_[BTN_COUNT]= {};
+    bool        usingPaHub_            = false;
+
+    void selectIfNeeded();
+    static void onTimer(lv_timer_t* t);
+    void update();
+};