- Add open-skills auto-clone/pull/sync support in skills loader
- Clone https://github.com/besoeasy/open-skills to ~/open-skills
- Weekly sync via .zeroclaw-open-skills-sync marker
- Env controls: ZEROCLAW_OPEN_SKILLS_ENABLED, ZEROCLAW_OPEN_SKILLS_DIR
- Load open-skills markdown files before workspace skills
- Track Skill.location for accurate prompt rendering
- Update system prompt to render skill.location with fallback
- Use actual file path when available
- Maintain backward compatibility with workspace SKILL.md path
- Fix clippy warnings across tests and supporting files
- Readable timestamp literals
- Remove underscore bindings in tests
- Use struct update syntax for Config::default() patterns
- Fix module inception, duplicate attributes, manual strip
- Clean raw string hashes and empty string construction
Resolves: #77