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/CMakeLists.txt

@@ -0,0 +1,10 @@
+file(GLOB_RECURSE SOURCE_FILES Source/*.c*)
+file(GLOB_RECURSE UNIT_MODULE_FILES ../../../Libraries/M5UnitModules/Source/*.c*)
+
+idf_component_register(
+    SRCS ${SOURCE_FILES} ${UNIT_MODULE_FILES}
+    # Library headers must be included directly,
+    # because all regular dependencies get stripped by elf_loader's cmake script
+    INCLUDE_DIRS ../../../Libraries/TactilityCpp/Include ../../../Libraries/M5UnitModules/Include
+    REQUIRES TactilitySDK
+)