Add CI files

.github/workflows/cibuildwheel.yml

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+name: Build
+
+on:
+  push:
+    tags:
+      # ytf did they invent their own syntax that's almost regex?
+      # ** matches 'zero or more of any character'
+      - 'release-v[0-9]+.[0-9]+.[0-9]+**'
+      - 'prerelease-v[0-9]+.[0-9]+.[0-9]+**'
+jobs:
+  build_wheels:
+    name: Build wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        # macos-13 is an intel runner, macos-14 is apple silicon
+        os: [ubuntu-latest, windows-latest, macos-13]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build wheels
+        uses: pypa/[email protected]
+        env:
+          CIBW_SOME_OPTION: value
+        with:
+          package-dir: .
+          output-dir: wheelhouse
+          config-file: "{package}/pyproject.toml"
+      - uses: actions/upload-artifact@v4
+        with:
+          name: cibw-wheels-${{ matrix.os }}-${{ strategy.job-index }}
+          path: ./wheelhouse/*.whl
+
+  build_sdist:
+    name: Build source distribution
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build sdist
+        run: pipx run build --sdist
+      - uses: actions/upload-artifact@v4
+        with:
+          name: cibw-sdist
+          path: dist/*.tar.gz
+  create_release:
+    needs: [build_wheels, build_sdist]
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      checks: write
+      actions: read
+      issues: read
+      packages: write
+      pull-requests: read
+      repository-projects: read
+      statuses: read
+    steps:
+      - name: Get the tag name and determine if it's a prerelease
+        id: get_tag_info
+        run: |
+          FULL_TAG=${GITHUB_REF#refs/tags/}
+          if [[ $FULL_TAG == release-* ]]; then
+            TAG_NAME=${FULL_TAG#release-}
+            IS_PRERELEASE=false
+          elif [[ $FULL_TAG == prerelease-* ]]; then
+            TAG_NAME=${FULL_TAG#prerelease-}
+            IS_PRERELEASE=true
+          else
+            echo "Tag does not match expected patterns" >&2
+            exit 1
+          fi
+          echo "FULL_TAG=$TAG_NAME" >> $GITHUB_ENV
+          echo "TAG_NAME=$TAG_NAME" >> $GITHUB_ENV
+          echo "IS_PRERELEASE=$IS_PRERELEASE" >> $GITHUB_ENV
+      - uses: actions/download-artifact@v4
+        with:
+          # unpacks all CIBW artifacts into dist/
+          pattern: cibw-*
+          path: dist
+          merge-multiple: true
+      - name: Create Draft Release
+        id: create_release
+        uses: softprops/action-gh-release@v2
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          name: ${{ env.TAG_NAME }}
+          draft: true
+          prerelease: ${{ env.IS_PRERELEASE }}
+          files: "./dist/*" 

.github/workflows/publish_pypi.yml

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+# The cibuildwheel action triggers on creation of a release, this
+# triggers on publication.
+# The expected workflow is to create a draft release and let the wheels
+# upload, and then hit 'publish', which uploads to PyPi.
+
+on:
+  release:
+    types:
+      - published
+
+jobs:
+  upload_pypi:
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/blis
+    permissions:
+      id-token: write
+      contents: read
+    if: github.event_name == 'release' && github.event.action == 'published'
+    # or, alternatively, upload to PyPI on every tag starting with 'v' (remove on: release above to use this)
+    # if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
+    steps:
+      - uses: robinraju/release-downloader@v1
+        with:
+          tag: ${{ github.event.release.tag_name }}
+          fileName: '*'
+          out-file-path: 'dist'
+      - uses: pypa/gh-action-pypi-publish@release/v1