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/app/i2cscanner/I2cHelpers.cpp

@@ -3,6 +3,7 @@
 #include "StringUtils.h"
 #include <iomanip>
 #include <vector>
+#include <sstream>
 
 namespace tt::app::i2cscanner {