Feature: an option to use in-cell YAML syntax

[Nowosad]

Since a few versions the namer package allows to add chunk names to the qmd documents (https://github.com/jumpingrivers/namer/blob/789d363118de89dd04454aea5f333c8fdc5f6052/NEWS.md). However, it only uses "the RMarkdown style" (chunks are named inside the code chunk definition). It may cause some problems for Quarto documents, especially the ones that mix a few languages or other engines like mermaid or ojs. Thus -- an option to use in-cell YAML syntax, e.g.,

```{r}
#| label: mylabel

would be nice to have.

Related discussion: https://github.com/quarto-dev/quarto-cli/issues/12977#issuecomment-3018360863