Add macOS simulator build to pipelines (#162)

- GitHub actions changed to build simulator on macOS (it's broken, but at least we get a good code portability check for now!)
- `Buildscripts/` shell scripts updated to use `/bin/sh` so it works on macOS too
- Various includes fixed in various subprojects so the code is more portable

Tactility/Source/lvgl/Init.cpp

@@ -5,7 +5,7 @@
 #include "hal/Touch.h"
 #include "hal/Keyboard.h"
 #include "lvgl/LvglKeypad.h"
-#include "lvgl/Lvgl.h"
+#include "lvgl/LvglDisplay.h"
 #include "kernel/SystemEvents.h"
 
 namespace tt::lvgl {

Tactility/Source/lvgl/LvglDisplay.cpp

@@ -1,4 +1,4 @@
-#include "lvgl/Lvgl.h"
+#include "lvgl/LvglDisplay.h"
 #include "Check.h"
 
 namespace tt::lvgl {