Add support for Tabset groups in `revealjs`

[matulad]

Bug description

Hi,

I'm preparing a presentation to explain some cool features Quarto has to my colleagues. I've found out the .panel-tabset groups is not working in Revealjs format. It renders correctly, but the synchronous tabset switching is not working.

Just by changing format to html, it starts working again.

Thanks,
Dominik

Steps to reproduce

---
title: "Untitled"
format: revealjs
---

:::: {.panel-tabset group="top_group"}
### A 

::: {.panel-tabset .nav-pills group="example_group"}
#### a

text A-a

#### b

text A-b

:::

### B

::: {.panel-tabset .nav-pills group="example_group"}
#### a

text B-a

#### b

text B-b

:::
::::

Expected behavior

The tabs a / b should be toggled synchronously.

Actual behavior

In revealjs, it behaves like no tabset group is present.

Your environment

• OS: Windows 10
• IDE: VSCode

Quarto check output

Quarto 1.6.39
[>] Checking environment information...
Quarto cache location: C:\Users\dmatula\AppData\Local\quarto
[>] Checking versions of quarto binary dependencies...
Pandoc version 3.4.0: OK
Dart Sass version 1.70.0: OK
Deno version 1.46.3: OK
Typst version 0.11.0: OK
[>] Checking versions of quarto dependencies......OK
[>] Checking Quarto installation......OK
Version: 1.6.39
Path: C:\Users\dmatula\AppData\Local\Programs\Quarto\bin
CodePage: 1250

[>] Checking tools....................OK
TinyTeX: (not installed)
Chromium: (not installed)

[>] Checking LaTeX....................OK
Tex: (not detected)

[>] Checking basic markdown render....OK

[>] Checking Python 3 installation....OK
Version: 3.10.7
Path: c:/Users/dmatula/Documents/something/env/Scripts/python.exe
Jupyter: 5.5.0
Kernels: python3

[>] Checking Jupyter engine render....OK

[>] Checking R installation...........OK
Version: 4.2.0
Path: C:/PROGRA1/R/R-421.0
LibPaths:
- C:/Users/dmatula/AppData/Local/R/win-library/4.2
- C:/Program Files/R/R-4.2.0/library
knitr: 1.45
rmarkdown: 2.25

[>] Checking Knitr engine render......OK

[cscheid]

I think we only advertise tabset groups in the html format, but this a completely fair feature request.

Here's a slightly simpler repro that doesn't rely on nested tabsets:

---
title: "Untitled"
format: revealjs
---

::: {.panel-tabset .nav-pills group="example_group"}

#### a

text A-a

#### b

text A-b

:::

::: {.panel-tabset .nav-pills group="example_group"}
#### a

text B-a

#### b

text B-b

:::