Add .claude-plugin/marketplace.json defining the ourdigital-skills local directory marketplace: 8 themed skill plugins (core/seo/notion/jamie/notebooklm/gtm/dintel/utils, 66 skills) + 3 standalone command plugins (mac-optimizer, multi-agent-guide, dintel-bootstrap). Every skill path resolves to a root SKILL.md.
Fix README install instructions: clarify Quick Install scope (commands + venv + creds, not skills); correct the Claude Code skill symlink target to the skill root (was desktop/, which would not load); fix the Claude Desktop import step.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
