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-help/SKILL.md

@@ -0,0 +1,23 @@
+---
+name: gsd-help
+description: Show available GSD commands and usage guide
+---
+
+<objective>
+Display the complete GSD command reference.
+
+Output ONLY the reference content below. Do NOT add:
+- Project-specific analysis
+- Git status or file context
+- Next-step suggestions
+- Any commentary beyond the reference
+</objective>
+
+<execution_context>
+@.agent/get-shit-done/workflows/help.md
+</execution_context>
+
+<process>
+Output the complete GSD command reference from @.agent/get-shit-done/workflows/help.md.
+Display the reference content directly — no additions or modifications.
+</process>