Track CLAUDE.md and stop ignoring agent instruction files

AGENTS.md has been tracked and public for a while, so the .gitignore
entries were inert and misleading. Commit the CLAUDE.md pointer so
Claude Code users get the repo instructions too.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
ae7cc97e30Simone committed on 7/2/2026, 1:33:45 AMparent86b2bca
2 files changedLine totals unavailable