Typst: Move Pandoc interpolated variable from typst-template.typ to typst-show.typ

[christopherkenny]

Description

One Pandoc variable was referenced in typst-template.typ. This moves it to the typst-show.typ file, adding a new variable to the article function call.

Closes #10212.

Checklist

I have (if applicable):

• filed a contributor agreement.
• referenced the GitHub issue this PR closes
• updated the appropriate changelog

[cscheid]

Since this means we honor abstract-title on typst now, we should change src/resources/schema/document-attributes.yml and rerun quarto build-js to get autocompletions to work.

[gordonwoodhull]

I've tested and I think we should merge and backport, to maintain the convention of referencing Pandoc variables / metadata only in typst-show.typ

[gordonwoodhull]

Ah, didn't see this at first, but now I see - yes my i18n changes in #9829 enabled abstract-title for Typst as a side-effect. We should reflect that in the schema. Will do!

[gordonwoodhull]

Merged to main, along with the schema change. Will backport now. Thanks @christopherkenny!

[cscheid]

@gordonwoodhull If you're at it, adding abstract-title to our feature-format matrix would be a good thing.

[gordonwoodhull]

Sure... I don't think we have entered any related features. Judging from the docs, I think this should go under

feature-format-matrix/qmd-files/title-blocks/metadata-labels/