Move `skylighting-core` to @jgm (#5559)
Move `skylighting-core` to @jgm (#5559)

fpco/stackage,simonmichael/stackage,clinty/stackage,mrkkrp/stackage,michalkonecny/stackage,massysett/stackage,jonschoning/stackage,iand675/stackage,Daniel-Diaz/stackage,soenkehahn/stackage