### Bug description

As far as I can tell, code folding is not (yet) supported in confluence output? It would be amazing to have this and I think confluence provides [`expand` macros](https://support.atlassian.com/confluence-cloud/docs/insert-the-expand-macro/) that could be used for this purpose?

quarto version 1.3.242

e.g. for file

    ---
    title: "Test code folding"
    format: 
      confluence-html:
        code-fold: true
    ---

    ```{r}
    2 + 2
    ```

It looks like there's no code folding available.

<img width="981" alt="Screenshot 2023-03-07 at 08 45 03" src="https://user-images.githubusercontent.com/118288090/223370759-e518bd73-348e-4bba-b1c8-d9e8eaf1a268.png">


### Checklist

- [X] Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [X] Please [format your issue](https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us) so it is easier for us to read the bug report.
- [X] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] Please document the operating system you're running. If on Linux, please provide the specific distribution.
allenmanning
2023-03-07T08:48:57Z
ghost
bug enhancement publishing-confluence
Future
open
[Confluence] Code Folding Support
https://github.com/quarto-dev/quarto-cli/issues/4660