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`)

Tactility/Source/app/wifiapsettings/WifiApSettings.cpp

@@ -1,12 +1,15 @@
-#include "WifiApSettings.h"
-#include "TactilityCore.h"
-#include "app/AppContext.h"
-#include "app/alertdialog/AlertDialog.h"
-#include "lvgl.h"
-#include "lvgl/Style.h"
-#include "lvgl/Toolbar.h"
-#include "service/loader/Loader.h"
-#include "service/wifi/WifiSettings.h"
+#include "Tactility/app/wifiapsettings/WifiApSettings.h"
+
+#include "Tactility/app/AppContext.h"
+#include "Tactility/app/alertdialog/AlertDialog.h"
+#include "Tactility/lvgl/Style.h"
+#include "Tactility/lvgl/Toolbar.h"
+#include "Tactility/service/loader/Loader.h"
+
+#include <Tactility/TactilityCore.h>
+#include <Tactility/service/wifi/WifiSettings.h>
+
+#include <lvgl.h>
 
 namespace tt::app::wifiapsettings {