Draft: Integrate stack better

TODO:

• fix #188
• fix #153 (closed)
• add FreeBSD bindist
• add possibility to install hook from bootstrap-haskell script
• test on windows

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Forked stack is here:

• https://gitlab.haskell.org/maerwald/stack
• https://github.com/hasufell/stack

Bindists are here: https://downloads.haskell.org/ghcup/unofficial-bindists/stack/2.7.3.1/