feat: add experimental Label component

[joshblack]

Note

This is a part of our weekly mob programming session 👀

Token -> Label
AvatarToken -> Label w/ leading visual prop
IssueLabelToken -> IssueLabel

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Latest commit: 14c9aa2

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[github-actions]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	88.37 KB (0%)
packages/react/dist/browser.umd.js	88.68 KB (0%)

[lukasoppermann]

Hey, I am a bit concern with the name Label. A label is different from what we want. The correct name would be IssueLabel, can we rename it?

[langermank]

Notes for next pair session:

• Using this as a reference https://github.com/github/github/blob/1f7d3bba98e3d62a150a57ce4f72f4ec8631c018/ui/packages/label-token/LabelToken.tsx#L35
• We agreed to keep color2k