Categorise commonmark library

[mscharley]

Not sure what the standard for this repo is, but this is still prerelease strictly speaking, but progressing well so kicking this off early as things take time to merge.

[lpil]

Sweet! How about we put this in text as while it is implemented using parsing it is not used for parsing?

[mscharley]

It's arguably both - you can render out to HTML directly, you can parse into an AST (hayleigh plans to use this to render out to lustre components instead of the raw html mode), or one unstarted feature that I was considering but would be useful for this repo is generating an AST programmatically then rendering it out to markdown.

I don't have a strong opinion, especially if we can only pick one.

[mscharley]

There's also a pretty strong argument for it to go in a new Templating group along with things like Pug.

[lpil]

Let's go for "File Formats" as there's other AST producing parsers there

[mscharley]

@lpil done!