Add CheckboxGroup

[Jonas-C]

Hi! I'm currently wiring together my own version of a CheckboxGroup using a version of Chakras FormControl. It works, but is slightly cumbersome and error-prone when comparing it to things like the RadioGroup found in zag. Would it be possible to get this into zag as a potential wrapper for several checkbox machines?

Prior art:

• CheckboxGroup (chakra)
• CheckboxGroup (react aria)

[segunadebayo]

We discussed this yesterday with the team. The agreement was to add this to Ark, not Zag.js since it's not really state machine-related.

It's now implemented here: chakra-ui/ark@9d2b7c5

It should be released shortly.

[Jonas-C]

You guys move quickly, thanks!