refactor(styleguide): Migrate Avatar component to monorepo

Created by: Tirokk

Authored by mattwr18 Jan 8, 2020 Merged Jan 21, 2020

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• follow @alina-beck PR review
• KISS

🍰 Pullrequest

Issues

• fixes #2675 (closed)

ToDos

• Add RoundedImage component that supports image responsiveness... as a minimum srcset