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/YellowBoard/Source/Lvgl.cpp

@@ -7,7 +7,7 @@
 
 bool twodotfour_lvgl_init() {
     const lvgl_port_cfg_t lvgl_cfg = {
-        .task_priority = tt::Thread::PriorityHigh,
+        .task_priority = tt::THREAD_PRIORITY_RENDER,
         .task_stack = 8096,
         .task_affinity = -1, // core pinning
         .task_max_sleep_ms = 500,