Evaluate Changelog.jl

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Announcement: https://discourse.julialang.org/t/changelog-jl-release-announcement/112996

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Check if it works with https://www.conventionalcommits.org/en/v1.0.0/

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As it is right now, the tool provides two things:

1. Create links at the bottom of a CHANGELOG.md file when scanning links like ([#XXX]) and others. In other words, it helps identify missing "reference style links" and fix them when possible. It might be useful as a fix action, but it would be more interesting if the changelog file was fully managed by the package.

2. Convert CHANGELOG.md into a Documenter compatible md. Essentially, Documenter is not a complete Markdown parser, to the reference style links are not translated into explicit links. Changelog converts one into the other.

The main usage for us would be as a pre-commit hook to fix these links, although using Julia for that might be overkill. I haven't looked into alternatives.

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After JuliaDocs/Changelog.jl#6 we should reevaluate and decide how to proceed.