Pandoc should not hardcode inset: 6pt for Typst tables

[mcanouil]

Currently Pandoc (3.1.11.1) hardcodes an inset into tables which blocks any possible global customisation.

• pandoc/src/Text/Pandoc/Writers/Typst.hs

  Line 186 in ad1e979

  $$ "inset: 6pt" <> ","

(Adding eventually a rule in the template would be more appropriate/flexible.)

Example:

```{=typst}
#set table(
  inset: 40pt,
  fill: luma(225)
)
```

## Bad

| Hello |
|-------|
| World |


## Good

```{=typst}
#table(
  [Hello],
  [World],
)
```

Using Pandoc:

pandoc index.qmd --from markdown --to typst

Produces the following document where the Typst table will use the defined inset and fill, but the markdown table will only use fill because inset is hardcoded thus global setting has no effect.

#set table(
  inset: 40pt,
  fill: luma(225)
)
== Bad
<bad>
#figure(
align(center)[#table(
  columns: 1,
  align: (col, row) => (auto,).at(col),
  inset: 6pt,
  [Hello],
  [World],
)]
)

== Good
<good>
#table(
  [Hello],
  [World],
)