Support `abstract-title` for Typst format

[cderv]

I believe this could easily be supported like in HTML and some other formats by tweaking the template here

https://github.com/jgm/pandoc/blob/0f29d8195eeb526c4aa14d5f56818f905d5badb5/data/templates/template.typst#L62-L66

so that Abstract is not hard coded.

Though it probably needs a Writer update to match behavior with Docx or HTML that supports this field

[jgm]

Makes sense. I think it could all be done in the templates. Want to submit a PR?

[cderv]

I think it could all be done in the templates.

Looking at this closer, It seems Writers are currently setting some defaults and handling translation. Should translation of term works for Typst as HTML and Docx ?

https://github.com/jgm/pandoc/blob/ddc66cad0b0e170c48e7fdc01fbecf57f329add4/src/Text/Pandoc/Writers/Docx.hs#L916-L920 https://github.com/jgm/pandoc/blob/ddc66cad0b0e170c48e7fdc01fbecf57f329add4/src/Text/Pandoc/Writers/HTML.hs#L291 https://github.com/jgm/pandoc/blob/ddc66cad0b0e170c48e7fdc01fbecf57f329add4/src/Text/Pandoc/Writers/HTML.hs#L371

[jgm]

Yes, it would be good to use the translation of the Abstract term as the default value for abstract-title (which could be overridden). That's what is doen in the docx writer, as you see.