website: Add the CHANGELOG

[PhilipMetzger]

This was requested by @lilyball on Discord. I still think we should create a blog longterm so we can announce stuff and run surveys, but this small step won't block it.

Checklist

If applicable:

• I have updated CHANGELOG.md
• I have updated the documentation (README.md, docs/, demos/)
• I have updated the config schema (cli/src/config-schema.json)
• I have added/updated tests to cover my changes

[PhilipMetzger]

@ilyagr Do you have any suggestions how I can preserve the current CHANGELOG.md without needing to adjust all current links, since it fails the link-strict check of mkdocs?

[ilyagr]

I'm not sure whether it will work or is a good idea, but you could try using https://github.com/mondeja/mkdocs-include-markdown-plugin (which we are already using for the CLI reference) with rewrite_relative_urls: true.

[ilyagr]

I double-checked, and the docs/... links seem to magically work when copy-pasted into the release notes, e.g. https://github.com/jj-vcs/jj/releases/tag/v0.29.0. So, we probably don't want to change the links inside CHANGELOG.md itself. (Context: I briefly considered whether moving it to docs/ would be reasonable, but it seems not).

[PhilipMetzger]

So, we probably don't want to change the links inside CHANGELOG.md itself. (Context: I briefly considered whether moving it to docs/ would be reasonable, but it seems not).

Yes, I already had thrown the option of moving the file out of the window 😄 since it's important to preserve the top-level CHANGELOG as is.

I'm not sure whether it will work or is a good idea, but you could try using https://github.com/mondeja/mkdocs-include-markdown-plugin (which we are already using for the CLI reference) with rewrite_relative_urls: true.

Thanks for this suggestion, it'll hopefully work just like the CLI reference.

[PhilipMetzger]

I've adjusted all the links now, @ilyagr care to review?

[ilyagr]

Seems to work well and look good, thank you very much!

One downside is that every released version will likely have a useless skeleton section for [Unreleased], as in 312c610. But this is not fatal, and we could fix it in another PR if we come up with an idea.