Rendered avatar in profile screen. Future diffs in this stack will render the avatars in other places, and another future diff will render the pencil icon in the design when I start work on avatar creation later in the week.
This diff won't be landed until the avatars stack is all accepted
Depends on D7055
Linear Task: https://linear.app/comm/issue/ENG-3107/build-out-a-dummy-avatar-component-and-render-it-everywhere-we-will