Improve touch support beyond just the XrItem. Having support for touch input only through the XrItems is quite limiting. The XrItem is not always the right "surface" you'd want for an interactive model, as it's a flat rectangle. Only supporting touch for the XrItem is also an extra limitation and burden for anyone porting an existing QtQuick3D application to XR, as we've already seen in the Outrun demo when more hand interaction was needed on both the Quest and the AVP.