Add GitHub workflow for PyPI deployment

.github/workflows/deploy.yml

@@ -0,0 +1,37 @@
+name: Deploy to PyPI
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:  # Allow manual triggering
+
+permissions:
+  contents: read
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/prefer
+    permissions:
+      id-token: write  # Required for trusted publishing
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+
+    - name: Install build dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install build
+
+    - name: Build package
+      run: python -m build
+
+    - name: Publish to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1