Autompletion in yaml for knitr parameter

[olivroy]

Description

Similar to execute:, it would be great if knitr: had autocompletion in the yaml front matter.

With quarto it is now possible to replace

---
title: a title
format: html
---


```{r}
#| label: setup
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  dev = "ragg_png"
)
library(tidyverse)
```

with

---
title: a title
format: html
knitr:
  opts_chunk: 
    collapse: true
    comment: "#>"
    dev: ragg_png
---


```{r}
#| label: setup
library(tidyverse)
```

Howver, there is no autocompletion available.

It would be great if the behavior of autocompletion for knitr matched the execute: one.

The feature is documented https://quarto.org/docs/computations/r.html#knitr-options

Edit: this may be a bug after all. having knitr: suggesting true or false is incorrect?

[olivroy]

Duplicate of #8881