chore: quantlab-agent 프로젝트 초기 설정

agent_guide 템플릿 기반으로 프로젝트 구조 설정.
Gitea(quantlab-agent), Vikunja(project #15) 연동 완료.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.agent/skills/gsd-plant-seed/SKILL.md

@@ -0,0 +1,22 @@
+---
+name: gsd-plant-seed
+description: Capture a forward-looking idea with trigger conditions — surfaces automatically at the right milestone
+---
+
+
+<objective>
+Capture an idea that's too big for now but should surface automatically when the right
+milestone arrives. Seeds solve context rot: instead of a one-liner in Deferred that nobody
+reads, a seed preserves the full WHY, WHEN to surface, and breadcrumbs to details.
+
+Creates: .planning/seeds/SEED-NNN-slug.md
+Consumed by: /gsd-new-milestone (scans seeds and presents matches)
+</objective>
+
+<execution_context>
+@.agent/get-shit-done/workflows/plant-seed.md
+</execution_context>
+
+<process>
+Execute the plant-seed workflow from @.agent/get-shit-done/workflows/plant-seed.md end-to-end.
+</process>