Adding GH workflow for doing a release (#240)

Author: PicoCentauri

.github/workflows/release.yml

@@ -0,0 +1,41 @@
+name: Release
+
+on:
+  push:
+    tags: ["*"]
+
+jobs:
+  build:
+    name: Build distribution
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/project/skmatter
+    permissions:
+      id-token: write
+      contents: write
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: setup Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: "3.13"
+    - run: python -m pip install tox
+    - name: Build package
+      run: tox -e build
+    - name: Publish distribution to PyPI
+      if: startsWith(github.ref, 'refs/tags/v')
+      uses: pypa/gh-action-pypi-publish@release/v1
+    - name: Publish to GitHub release
+      if: startsWith(github.ref, 'refs/tags/v')
+      uses: softprops/action-gh-release@v2
+      with:
+        files: |
+          dist/*.tar.gz
+          dist/*.whl
+        prerelease: ${{ contains(github.ref, '-rc') }}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}