chore(release): add workflow to push releases to PyPI (#23)

.github/workflows/release.yml

@@ -0,0 +1,67 @@
+name: Release and Publish
+
+on:
+  push:
+    branches: [ main ]
+    tags: [ '[0-9]+.[0-9]+.[0-9]+' ]
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    if: ${{ github.repository == 'ibis-project/ibisml' }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      - name: Install build dependencies
+        run: |
+          python -m pip install build --user
+      - name: Build package
+        run: |
+          python -m build
+      - name: Upload package
+        uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist/
+          retention-days: 1
+  release:
+    name: Release to GitHub
+    runs-on: ubuntu-latest
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/')
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist/
+      - name: Publish to GitHub release page
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            ./dist/*.whl
+            ./dist/*.tar.gz
+  publish:
+    name: Publish to PyPI
+    runs-on: ubuntu-latest
+    needs: release
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist/
+      - name: Publish package to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          password: ${{ secrets.PYPI_API_TOKEN }}