feat(avatar): add avatar badge and avatar group

[carstenlebek]

This PR adds AvatarBadge and AvatarGroup (including AvatarList) components.

The only necessary change to the existing Avatar component was to remove the overflow-hidden class from the Avatar component and instead add rounded-full to the AvatarImage component.

The badge could be used as an status indicator as shown in the demo.

The AvatarGroup component implements a limit of avatars and an optional overflow indicator.

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[lucasjinreal]

Any updates>>>

[avjabalpur]

Any update in this PR

[tyeetale]

will this pr review be approved?

[ataschz]

Any update?

[nicostombros]

+1, this would be a great addition

[the-iter8]

+1

[JuanDa237]

#3344

[JuanDa237]

I suggest the AvatarFallback class to be: border bg-primary text-white

This mantains the original color, and add a border to separate each avatar.

[c0yote]

+1

[pxlgrdnr]

+1