Re-implement Core2 and other improvements (#141)

- Create real drivers instead of wrapping M5Unified/M5GFX
- Display HAL improvements (better default base class behaviour)
- Fixed bug with LVGL statusbar service locking (would hang indefinitely waiting for mutex, causing WDT issues)
- Fixes for `Critical.h`
- Fixes and improvements for `Dispatcher` and `DispatcherThread`

Boards/M5stackShared/Source/hal/M5stackDisplay.h

@@ -17,10 +17,6 @@ public:
 
     bool stop() override;
 
-    void setPowerOn(bool turnOn) override {}
-    bool isPoweredOn() const override { return true; };
-    bool supportsPowerControl() const override { return false; }
-
     tt::hal::Touch* _Nullable createTouch() override;
 
     lv_display_t* _Nullable getLvglDisplay() const override { return displayHandle; }