ci: workflow to automate releases on tags

.github/workflows/release.yml

@@ -0,0 +1,54 @@
+# Adapted from: https://github.com/pypa/cibuildwheel/blob/main/examples/github-deploy.yml
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+
+jobs:
+  build_wheels:
+    name: Build wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-24.04
+          - ubuntu-24.04-arm
+    steps:
+      - uses: actions/checkout@v5
+      - name: Build wheels
+        run: pipx run cibuildwheel==3.1.4
+      - uses: actions/upload-artifact@v4
+        with:
+          name: cibw-wheels-${{ matrix.os }}-${{ strategy.job-index }}
+          path: ./wheelhouse/*.whl
+  
+  build_sdist:
+    name: Build source distribution
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - name: Build sdist
+        run: pipx run build --sdist
+      - uses: actions/upload-artifact@v4
+        with:
+          name: cibw-sdist
+          path: dist/*.tar.gz
+
+  upload_pypi:
+    needs: [build_wheels, build_sdist]
+    runs-on: ubuntu-latest
+    environment: pypi
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v5
+        with:
+          # unpacks all CIBW artifacts into dist/
+          pattern: cibw-*
+          path: dist
+          merge-multiple: true
+      - uses: pypa/gh-action-pypi-publish@release/v1
+        # TODO: delete below once workflow is proved functional
+        with:
+          repository-url: https://test.pypi.org/legacy/