Add release.yml action (#146)

.github/workflows/release.yml

@@ -0,0 +1,22 @@
+name: Release
+
+# Adapted from https://pdm-project.org/latest/usage/publish/
+on:
+  release:
+    types: [published]
+
+jobs:
+  pypi-publish:
+    name: Publish to PyPI
+    environment: release
+    runs-on: ubuntu-latest
+    permissions:
+      # This permission is needed for private repositories.
+      contents: read
+      # IMPORTANT: this permission is mandatory for trusted publishing
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pdm-project/setup-pdm@v4
+      - name: Publish package distributions to PyPI
+        run: pdm publish