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/Simulator/Source/hal/SdlDisplay.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #include "SdlTouch.h"
-#include "hal/Display.h"
+#include <Tactility/hal/Display.h>
 
 extern lv_disp_t* displayHandle;