@backstage/migrate-mui-avatar-to-bui-avatar

Migrates MUI 4 Avatar usage to Backstage UI Avatar.

Covers

• Named barrel and deep @material-ui/core/Avatar imports
• alt → name when name is absent; requires src (empty string when missing)
• Reasonable pixel style width/height → BUI size
• Merging into an existing @backstage/ui import

TODOs left for humans

• Missing both name and alt
• Unknown / unmapped sizes
• variant, classes, and other unsupported MUI props

Won't do

• Rewriting custom children renderings beyond initials fallback via name