Add Amazon Q appendix to primitives matrix #227

Goal

Document Amazon Q Developer in the primitives matrix for contributors using Q as their loop host.

Files

• docs/primitives-matrix.md

Acceptance criteria

• Add an Amazon Q appendix (same style as Gemini CLI / Zed appendices)
• Cover scheduling, rules/context files, STATE.md, maker/checker split
• Honest note where a primitive is not first-class in Q yet
• One copy-paste week-one Daily Triage prompt (report-only)

Estimated time: ~30 minutes

Comment "I'll take this" to get assigned.