CI : GitHub Actions 배포 설정 및 빌드 결과물 git 추적 제거

- docs/ 빌드 결과물을 git 인덱스에서 제거 (.gitignore에 docs/* 유지)
- GitHub Actions 워크플로우 추가: main 브랜치 push 시 자동 빌드 후 gh-pages 브랜치에 배포

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

Author: ppiyakk2

.github/workflows/publish.yml

@@ -0,0 +1,29 @@
+name: Publish to GitHub Pages
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Quarto
+        uses: quarto-dev/quarto-actions/setup@v2
+
+      - name: Render Quarto project
+        uses: quarto-dev/quarto-actions/render@v2
+
+      - name: Deploy to GitHub Pages
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs
+          publish_branch: gh-pages

.gitignore

@@ -1 +1,4 @@
 /.quarto/
+docs/*
+
+**/*.quarto_ipynb