Add list-witnesses to stackage
Add list-witnesses to stackage

Daniel-Diaz/stackage,soenkehahn/stackage,fimad/stackage,peti/stackage,mrkkrp/stackage,stackbuilders/stackage,jonschoning/stackage,michalkonecny/stackage,wereHamster/stackage,massysett/stackage,spencerjanssen/stackage,athanclark/stackage,int-index/stackage,fpco/stackage,iand675/stackage,asr/stackage,ethercrow/stackage,mstksg/stackage,clinty/stackage,simonmichael/stackage