No upstream support for alt-text in Typst

[mcanouil]

In addition, Pandoc's writer for typst does not seem to support alt-text which might be the main reason for Typst in Quarto not supporting this option.

echo '![Caption "some title"](image.png){alt="Alt text describing the image"}' | quarto pandoc -f markdown -t typst
echo '![Caption "some title"](image.png){alt="Alt text describing the image"}' | pandoc -f markdown -t typst

More generally Pandoc's writer does seem to allow only the height/width attributes.

• https://github.com/jgm/pandoc/blob/09c9be2c12c50bc4a6a590fb43b92eb67758af94/src/Text/Pandoc/Writers/Typst.hs#L540-L559

Originally posted by @mcanouil in #13596 (reply in thread)

[mcanouil]

I've opened a pull request to fix this:

• feat(typst.hs): Add alt text support for images in Typst writer (accessibility) jgm/pandoc#11394