Use comrak instead of hoedown

[kivikakk]

Fixes #53.

There's an actual missing feature still, looking at this diff — footnotes. Do you know if these are actually used in Markdown files parsed by docs.rs? They're not supported by GitHub's own README.md renderer, for what it's worth.

[kivikakk]

And a screenshot comparison (from the example package on #53):

Before	After

[onur]

This is great, and thank you very much for all your troubles!

[kivikakk]

Thank you! Let me know if you have any trouble or anything with it, I'd be happy to help. :)

[zStruCat]

There's an actual missing feature still, looking at this diff — footnotes. Do you know if these are actually used in Markdown files parsed by docs.rs? They're not supported by GitHub's own README.md renderer, for what it's worth.

Footnotes are now a part of github-favored markdown¹, is it now possible to add this feature to the docs?

Footnotes

1. https://github.blog/changelog/2021-09-30-footnotes-now-supported-in-markdown-fields/ ↩

[kivikakk]

Indeed, they've since been added to Comrak too (to match cmark-gfm; kivikakk/comrak#42), so it shouldn't be hard.

[jyn514]

Footnotes are now a part of github-favored markdown1, is it now possible to add this feature to the docs?

I'm happy to review PRs enabling the feature :) not sure when I'll have time to work on it myself.