feat(agents): add loaf agent support

[veyzyn]

Summary

Add loaf as a supported agent in the Skills CLI installer.

Changes

• add loaf to AgentType
• add Loaf agent config:
  • project path: .agents/skills
  • global path: ~/.loaf/skills
  • detection: ~/.loaf exists
• regenerate README/package metadata via sync script

Notes

• Loaf also supports the universal path ~/.agents/skills for skill discovery.
• This registry entry keeps ~/.loaf/skills as the explicit global install target for --agent loaf.

Validation

• node scripts/validate-agents.ts
• node scripts/sync-agents.ts
• pnpm format
• pnpm type-check
• pnpm test

[quuu]

please support .agents/ at the global path

[veyzyn]

the cli supports .agents/, ive now changed the path in the pr to .agents/ aswell