quill: add project kickoff brief template

wizard-work/quill/project-kickoff-brief-template.md

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+PROJECT KICKOFF BRIEF
+=====================
+
+Project Name:     
+Owner:             
+Stakeholders:      
+Status:            DRAFT
+Last Updated:      2026-10-24
+
+1. PURPOSE
+----------
+One sentence: what are we building and why does it matter?
+
+2. SUCCESS METRICS
+------------------
+- Metric 1 (baseline -> target): 
+- Metric 2 (baseline -> target): 
+- Metric 3 (baseline -> target): 
+
+3. SCOPE
+--------
+IN:                    
+OUT (explicit exclusions): 
+
+4. TIMELINE
+-----------
+Phase 1 -  : 
+Phase 2 -  : 
+Launch     : 
+
+5. TEAM & CONTACTS
+------------------
+Role        | Name      | Contact/Slack
+------------+-----------+-------------
+Lead        |           |
+Design      |           |
+Eng         |           |
+QA          |           |
+
+6. RISKS & MITIGATIONS
+----------------------
+Risk 1:                     | Mitigation: 
+Risk 2:                     | Mitigation: 
+Risk 3:                     | Mitigation: 
+
+7. OPEN QUESTIONS
+-----------------
+- [ ] Q1 (owner, due):
+- [ ] Q2 (owner, due):
+
+8. DECISIONS LOG
+----------------
+Date | Decision | Rationale | Owner
+-----+----------+-----------+------
+