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/UnPhone/Source/hal/UnPhoneTouch.h

@@ -1,9 +1,9 @@
 #pragma once
 
-#include "hal/Touch.h"
-#include "TactilityCore.h"
-#include "esp_lcd_panel_io_interface.h"
-#include "esp_lcd_touch.h"
+#include <Tactility/hal/Touch.h>
+#include <Tactility/TactilityCore.h>
+#include <esp_lcd_panel_io_interface.h>
+#include <esp_lcd_touch.h>
 
 class UnPhoneTouch : public tt::hal::Touch {