continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
Use proper Qt bindings (#65399). Note, current version didn't work for
me, new version does.
The libfive library is licensed under MPL 2.0, while the libfive-guile
and libfive-studio are under GPL 2+
Superseeds #66128
