New Vignette: Colour previews in R Markdown and Quarto

[mccarthy-m-g]

Since coloured cli output doesn’t just work in R Markdown and Quarto, it might be nice to show how to get coloured colour previews in these outputs using {fansi}, like I did here: https://tidytales.ca/posts/2022-12-20_palettes/

[mccarthy-m-g]

Or maybe, since this is short, just add a FAQ section somewhere with instructions like {cli} does: https://cli.r-lib.org/reference/faq.html