FIX-#000: Build bdist and sdist in CI and upload to PyPI

.github/workflows/build_wheels.yml

@@ -0,0 +1,85 @@
+name: Build and upload to PyPI
+
+on:
+  pull_request:
+
+jobs:
+  build_sdist:
+    name: Build source distribution
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout unidist
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+
+      - name: Build sdist
+        run: python setup.py sdist
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: cibw-sdist
+          path: dist/*.tar.gz
+
+      - name: Sanity check sdist files
+        run: ls ./dist
+
+  build_wheels:
+    needs: build_sdist
+    name: Build wheel for ${{ matrix.python[0] }}-${{ matrix.buildplat[1] }}
+    runs-on: ${{ matrix.buildplat[0] }}
+    strategy:
+      # Ensure that a wheel builder finishes even if another fails
+      fail-fast: false
+      matrix:
+        # GitHub Actions doesn't support pairing matrix values together, let's improvise
+        # https://github.com/github/feedback/discussions/7835#discussioncomment-1769026
+        buildplat:
+        - [ubuntu-22.04, manylinux_x86_64]
+        - [ubuntu-22.04, musllinux_x86_64]
+        - [macos-12, macosx_x86_64]
+        # Note: M1 images on Github Actions start from macOS 14
+        - [macos-14, macosx_arm64]
+        - [windows-2022, win_amd64]
+        - [windows-2022, win32]
+        python: [["cp37", "3.7"], ["cp38", "3.8"], ["cp39", "3.9"], ["cp310", "3.10"], ["cp311", "3.11"], ["cp312", "3.12"]]
+
+    steps:
+      - name: Checkout unidist
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+
+      - name: Build wheels
+        uses: pypa/[email protected]
+        env:
+          CIBW_BUILD: ${{ matrix.python[0] }}-${{ matrix.buildplat[1] }}
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: cibw-wheels-${{ matrix.python[0] }}-${{ matrix.buildplat[1] }}
+          path: ./wheelhouse/*.whl
+
+  upload_pypi:
+    needs: [build_wheels, build_sdist]
+    runs-on: ubuntu-latest
+    environment: testpypi
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          # unpacks all CIBW artifacts into dist/
+          pattern: cibw-*
+          path: dist
+          merge-multiple: true
+
+      - uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/