Fixes #886

What I did

I've added a pyproject.toml and a new hook that will allow pre-commit to install hadolint binaries using pip. I've done something similar for StyLua.

How I did it

I had to make an update to release-gitter to add version parsing from *.cabal files, but with that

How to verify it

I added a test to release-gitter that runs off my fork that validate this.

I also tested by adding the following to a repo of mine with pre-commit:

  - repo: https://github.com/hadolint/hadolint
    rev: refs/pull/1152/head
    hooks:
      - id: hadolint-github

It successfully downloaded and ran the checks.