fix(create-expert): clarify demo sample data must be embedded in instruction

[FL4TLiN3]

Summary

Clarify in the Demo Expert Template that sample data must be embedded directly in the instruction, not as placeholders.

Changes

• Renamed "Sample Data" section to "Embedded Sample Data" with IMPORTANT note
• Added concrete example showing what embedded sample data looks like (JSON format)
• Emphasized "do NOT make API calls" in demo mode instructions

Rationale

The previous template had [Include relevant sample data for demonstration] which was ambiguous. This update makes it explicit that the ecosystem-builder must generate actual sample data, not placeholder text.

Closes #361

🤖 Generated with Claude Code

---

Note

Strengthens the Demo Expert template to ensure zero-config demos use real embedded data.

• Updates apps/create-expert/src/lib/create-expert-toml.ts Demo Expert instructions: require embedded sample data (renamed to Embedded Sample Data), add an IMPORTANT note and a concrete JSON example, and emphasize “do NOT make API calls” in demo mode
• Adds .changeset/clarify-demo-sample-data.md for a patch release

^{Written by Cursor Bugbot for commit 9c496e5. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!