feat: q syntax files

[benlubas]

Description

Following this discussion #13936 (comment) with @cscheid

Syntax files from: here and here. I've modified the k file to remove the datetime regex which fail to parse for some reason.

I'm submitting this PR to add the q syntax highlighting files. As noted in that conversation, adding these files enabled syntax highlighting for q when I last tried it.

However, while testing on top of main, I have noticed some strange behavior. Maybe it's due to the pandoc version update?

```{python}
print("This is highlighted")
```

```{q}
show "this is not"
```

```q
show "but this is"
```

Maybe someone else will have a better idea of why that is?

Checklist

I have (if applicable):

• filed a contributor agreement.
• referenced the GitHub issue this PR closes
• updated the appropriate changelog in the PR
• ensured the present test suite passes
• added new tests
• created a separate documentation PR in Quarto's website repo and linked it to this PR

[posit-snyk-bot]

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