Add basic release action

.github/workflows/release.yml

@@ -0,0 +1,28 @@
+name: release
+
+on:
+  workflow_dispatch:
+
+jobs:
+  pypi-publish:
+    name: Upload release to PyPI
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/pytorch-finufft
+    permissions:
+      id-token: write
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python 3.11
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.11
+    - name: Build wheels
+      run: |
+        python -m pip install build
+        python -m build
+    - name: Publish package distributions to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        skip_existing: true