fix(layout-typst): Use fraction type for width to prevent overflow

[mcanouil]

Switch from using percentage to fraction type for column widths to avoid overflow issues in Typst.

Fixes #11578

Input	1.6.39	This PR
--- title: "Quarto Playground" format: typst --- ::: {layout="[1, 2, 2, 1, 3, 1, 1]"}        :::

[gordonwoodhull]

Thanks @mcanouil!

Please add a test e.g. under

tests/docs/smoke-all/typst

[gordonwoodhull]

As illustrated by the test, it would be nicer to convey the existing fractional numbers rather than converting to percent and using percentages as fractions.

layout="[1, 2, 2, 1, 3, 1, 1]

If that information is still available.

(On the principal that it’s nice if users can recognize their input in the Typst output, where possible.)

[mcanouil]

The issue is that the width is computed in what seems to be a generic code path.
It should be possible to add a Typst exception in it and avoid the first conversion to percentages: https://github.com/quarto-dev/quarto-cli/blob/2a2ddd67afc9a0d6ae211fb0d48443bf0db52bb9/src/resources/filters/layout/layout.lua

[gordonwoodhull]

Thanks @mcanouil, I took this approach in #11658:

The issue is that the width is computed in what seems to be a generic code path.
It should be possible to add a Typst exception in it and avoid the first conversion to percentages

It makes that code less generic (but the code wasn't really generic if it generates the wrong output in Typst).

[mcanouil]

I agree that it is best to have output as close as possible from the the input.
Feel free to close this PR.

[gordonwoodhull]

Closed in favor of #11658