Add terminal recording (GIF/asciicast) to README #8
Description
Summary
Record a terminal session showing SkillMesh in action and embed it in the README for visual impact.
Acceptance Criteria
- Record an asciinema or GIF showing: install, retrieve, and emit commands
- Show a multi-domain query that routes to the correct experts
- Keep the recording under 30 seconds
- Embed in the README between the "How It Works" and "60-Second Demo" sections
- Host the recording on asciinema.org or as a GIF in the repo