fix: Renamed CLAUDE.md to AGENTS.md

[dmartinol]

Summary

Fix #121

Pack(s) affected

• Other / repo-wide

Change type

• Update existing skill / agent
• Docs / README
• CI / tooling

Validation

• make validate passes locally

[TomerFi]

This rename is the right move — lola only picks up AGENTS.md, so our packs' instruction files are invisible to it today.

One concern: with current lola behavior, once we ship AGENTS.md in our packs, lola install will silently inject that content into users' instruction files with no opt-out. This is the exact problem tracked in LobsterTrap/lola#148 and LobsterTrap/lola#158, with a fix in progress at LobsterTrap/lola#159 (--no-instructions / --overwrite flags).

That PR still has unresolved review feedback and hasn't seen activity since June 1, so I wouldn't block on it. Users can already use --append-context for lighter-touch installs, and once #159 lands the experience improves further.

I'd suggest we merge this but call out the lola dependency in the description or a follow-up issue — something like "if you prefer lola not manage your instruction files, use --append-context until lola adds --no-instructions support."

Everything looks clean — the renames are content-identical, root CLAUDE.md is correctly untouched, validate_structure.py now rejects deprecated pack-level CLAUDE.md, and the workflow/catalog/scripts are all updated.