feat(engineering): add google-workspace-cli skill with 5 Python tools
New skill for Google Workspace administration via the gws CLI:
- SKILL.md with 4 workflows (Gmail, Drive/Sheets, Calendar, Security Audit)
- 5 stdlib-only Python scripts (doctor, auth setup, recipe runner, audit, analyzer)
- 3 reference docs, 2 asset files, 43 built-in recipes, 10 persona bundles
- cs-workspace-admin agent, /google-workspace slash command
- Standalone marketplace plugin entry with .claude-plugin/plugin.json
- Cross-platform sync (Codex CLI, Gemini CLI), MkDocs docs pages
- All documentation updated (173 skills, 250 tools, 15 agents, 15 commands)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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