Upstream JASP ships no Linux binary, so the existing AUR package builds
everything from source including several hundred R packages. This builds
that once in CI and publishes the result as jasp-desktop-bin.
JASP links against the system R and Qt6 rather than bundling them, so a
rebuild is triggered by an Arch r/qt6-base bump as well as by a new JASP
release, and the generated PKGBUILD pins depends to the versions actually
built against.
