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/TestUnitJoystick2.h

@@ -0,0 +1,26 @@
+#pragma once
+#include "TestViewBase.h"
+#include <UnitJoystick2.h>
+#include <UnitPaHub.h>
+
+class TestUnitJoystick2 final : public TestViewBase {
+public:
+    void onStart(lv_obj_t* parent, AppHandle handle, M5UnitTest* app) override;
+    void onStop() override;
+
+private:
+    UnitPaHub     hub_;
+    UnitJoystick2 unit_;
+    lv_obj_t*   lblXY_      = nullptr;
+    lv_obj_t*   lblButton_  = nullptr;
+    lv_obj_t*   dot_        = nullptr;
+    lv_obj_t*   joyCont_    = nullptr;
+    lv_timer_t* timer_      = nullptr;
+    bool        usingPaHub_ = false;
+    int         joyArea_    = 120;
+    int         dotSize_    = 16;
+
+    void selectIfNeeded();
+    static void onTimer(lv_timer_t* t);
+    void update();
+};