Add group for options that need Typst specific content in docs

[cwickham]

1. Adds typst to the document groups in groups.yml so that document-typst.yml options (logo, margin-geometry, theorem-appearance) are included when generating format reference pages.

   Without this, the typst-specific options defined in document-typst.yml were never read by tools/reference.ts in quarto-web, so they didn't appear on the typst reference page.

2. Moves the typst margin definition from document-reveal-layout.yml to document-layout.yml, resulting in two separate declarations of margin. This pattern already exists for several other options in the schema so I'm hoping it doesn't cause problems.

   @gordonwoodhull could you double-check the Typst schema for margin Claude proposed here?

Fix for #13412

[posit-snyk-bot]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scanner	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues

💻 Catch issues earlier using the plugins for VS Code, JetBrains IDEs, Visual Studio, and Eclipse.

[cderv]

Awesome thank you !!

Why Partial fix only ?

I think this + the reference update covers it right ?

[cwickham]

@cderv we still have a Slide Layout section on the typst page:

I'll add something to this PR for that shortly.

[cwickham]

@cderv this should now close #13412. It's a bigger change, so please review the edited description. I've also tagged @gordonwoodhull for a review, particularly on the margin schema for typst.

[gordonwoodhull]

The margin schema looks good.

I remember looking into grouping for this problem, and thinking it was not exactly the right tool, but I can't find notes/transcript of this. If it works we should use it!

[cwickham]

After talking to @cscheid, this doesn't really work. Having margin in two places worked nicely for the docs, but caused trouble with the YAML validation. One schema would win, and documents using the other schema at the top level would then fail to validate.

This is now a smaller change:

• Add typst-document.yml to groups.yml. This ensures the options margin-geometry and theorem-appearance appear on the Reference pages.
• Move margin from document-reveal-layout.yml to document-layout.yml. This moves margin on the Reference pages for both Typst and Revealjs out of the "Slide Layout" section and into the "Layout" section.

[cwickham]

This now closes the doc issue but revealed a bigger issue I did my best to document in: #14122