[feature] SPs [Metagram](UI): Avatar Component

[sosweetham]

Description

Make an avatar component with variants that pre apply classes, variants need to be named according to tailwind nomenclature (xs,sm,md,lg), needs to be extensible like other components

make story too

Reference

not exactly a 1:1 reference but for extensibility use orobo repo as a reference to get to know general expectation surrounding it

Acceptance Criteria

Component designed as expected and story