feat(button-group): add new component

[filipjnc]

I created a new button group component that uses @radix-ui/react-radio-group but looks like the tabs list + triggers components:

Check it out at:
http://localhost:3001/docs/components/button-group or http://localhost:3001/sink

I use it for use cases like this:

[vercel]

@filipjnc is attempting to deploy a commit to the shadcn-pro Team on Vercel.

A member of the Team first needs to authorize it.

[statusunknown418]

plans on merging this?

[statusunknown418]

this is really useful, although I found a bug that wherever the component is used, it forces a reload when the parent comp is updated

[Cerfio]

Works perfectly, thank you for your work 🎉 !

[SaadBazaz]

This looks nice, but do you think @radix-ui/react-toggle-group could work as a baseline?

[shadcn]

@filipjnc I've merged a PR for toggle group which should cover this here. #1547.

I'm going to mark this PR as closed but feel free to reopen if you think toggle group does not cover all the cases and we still need a button group component.

Thanks for your help. Appreciate it!