Add more packages to head.hackage

Recently Zubin checked 9.4 against stackage, which found bugs manifesting when compiling

monadology #23861 (closed)
comfort-array #23862 (closed)
functor-combinators #23863 (closed)
hindent #23864 (closed)
xmonad-contrib #23865 (closed)

Browsing through build logs and a quick git grep shows that none of those packages are in head.hackage. The goal of this ticket is to add those packages, or at least a subset.

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