ci: PyPI 자동 배포 워크플로우 및 타입 마커 추가

GitHub Actions:
- 태그 푸시 시 자동으로 PyPI 배포
- uv build 및 uv publish 사용
- PyPI API 토큰 사용 (PYPI_API_TOKEN secret)

py.typed:
- PEP 561 준수 타입 마커 파일
- mypy 등 타입 체커가 패키지 타입 힌트 인식

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: wkdgus1164

.github/workflows/publish.yml

@@ -0,0 +1,36 @@
+name: Publish to PyPI
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write  # OIDC for trusted publishing
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: true
+
+      - name: Set up Python
+        run: uv python install 3.12
+
+      - name: Install dependencies
+        run: uv sync
+
+      - name: Run tests
+        run: uv run pytest tests/ -v
+
+      - name: Build package
+        run: uv build
+
+      - name: Publish to PyPI
+        run: uv publish
+        env:
+          UV_PUBLISH_TOKEN: ${{ secrets.PYPI_API_TOKEN }}