GitHub Codeowners troch TombWater

Decorate GitHub PR pages with code ownership and approval status

Decorations:
- "Code owners" section on the PR conversation page showing approvals needed
- Icons indicating role of comment authors (📄 PR author, 🛡️ code owner, 💡 other contributor)
- Owner labels in file headers on the files tab and compare view

Owner Labels:
- Hovering shows a drawer with the members of that team
- Clicking highlights that owner label in all file headers
- Green with a checkmark (✓): teams that have already approved
- Red with a star (★): teams that you're a member of
- Green with a star (☆): your teams that have approved

Does not require a GitHub access token

The source code for this extension can be found at:
https://github.com/TombWater/github-codeowners