Project restructuring (fixes macOS builds) (#198)

- Create `Include/` folder for all main projects
- Fix some issues here and there (found while moving things)
- All includes are now in `Tactility/` subfolder and must be included with that prefix. This fixes issues with clashing POSIX headers (e.g. `<semaphore.h>` versus Tactility's `Semaphore.h`)

Boards/LilygoTdeck/Source/LilygoTdeck.cpp

@@ -1,9 +1,10 @@
-#include "hal/Configuration.h"
 #include "hal/TdeckDisplay.h"
 #include "hal/TdeckKeyboard.h"
 #include "hal/TdeckPower.h"
 #include "hal/TdeckSdCard.h"
 
+#include <Tactility/hal/Configuration.h>
+
 bool tdeck_init_power();
 bool tdeck_init_hardware();
 bool tdeck_init_lvgl();