add GHA PyPI

Author: ocefpaf

.github/workflows/pypi.yml

@@ -0,0 +1,52 @@
+name: Publish to PyPI
+
+on:
+  pull_request:
+  push:
+  release:
+    types:
+      - published
+
+jobs:
+  pypi-publish:
+    name: Upload release to PyPI
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/xarray_subset_grid/
+    permissions:
+      id-token: write  # IMPORTANT: this permission is mandatory for trusted publishing
+    steps:
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
+      with:
+        # Should be enough for setuptools-scm
+        fetch-depth: 100
+        persist-credentials: false
+
+    - name: Get tags
+      run: git fetch origin 'refs/tags/*:refs/tags/*'
+
+    - name: Set up Python
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065  # v5.6.0
+      with:
+        python-version: "3.x"
+
+    - name: Install build tools
+      run: |
+        python -m pip install --upgrade pip build twine
+
+    - name: Build binary wheel
+      run: python -m build --sdist --wheel . --outdir dist
+
+    - name: CheckFiles
+      run: |
+        ls -lh dist
+
+    - name: Test wheels
+      run: |
+        cd dist && python -m pip install xarray_subset_grid*.whl
+        python -m twine check *
+
+    - name: Publish package distributions to PyPI
+      if: success() && github.event_name == 'release'
+      uses: pypa/gh-action-pypi-publish@76f52bc884231f62b9a034ebfe128415bbaabdfc  # v1.12.4