Add GitHub Actions workflow for automatic PyPI publishing

Author: johnhuang316

.github/workflows/publish-to-pypi.yml

@@ -0,0 +1,44 @@
+name: Publish to PyPI
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.10'
+    
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install build twine
+    
+    - name: Extract version from tag
+      id: get_version
+      run: echo "VERSION=${GITHUB_REF#refs/tags/v}" >> $GITHUB_ENV
+      
+    - name: Update version in files
+      run: |
+        # Update pyproject.toml version
+        sed -i "s/^version = .*/version = \"${{ env.VERSION }}\"/" pyproject.toml
+        
+        # Update __init__.py version
+        sed -i "s/__version__ = .*/__version__ = \"${{ env.VERSION }}\"/" src/code_index_mcp/__init__.py
+    
+    - name: Build package
+      run: python -m build
+    
+    - name: Check package
+      run: twine check dist/*
+      
+    - name: Publish to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        password: ${{ secrets.PYPI_API_TOKEN }}