chore(cibw): build pure-Python wheel

.github/workflows/cibuildwheel.yaml

@@ -9,8 +9,14 @@ on:
   # NOTE(vytas): Also allow to release to Test PyPi manually.
   workflow_dispatch:
 
+  # TODO(vytas): Just testing in a PR.
+  pull_request:
+    branches:
+      - master
+
 jobs:
   build-sdist:
+    # NOTE(vytas): We actually build sdist and pure-Python wheel.
     name: sdist
     runs-on: ubuntu-latest
 
@@ -25,11 +31,13 @@ jobs:
         with:
           python-version: "3.12"
 
-      - name: Build sdist
+      - name: Build sdist and pure-Python wheel
+        env:
+          FALCON_DISABLE_CYTHON: "Y"
         run: |
           pip install --upgrade pip
           pip install --upgrade build
-          python -m build --sdist
+          python -m build
 
       - name: Check built artifacts
         run: |
@@ -39,7 +47,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: cibw-sdist
-          path: dist/*.tar.gz
+          path: dist/falcon-*
 
   build-wheels:
     name: ${{ matrix.python }}-${{ matrix.platform.name }}
@@ -110,7 +118,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: cibw-wheel-${{ matrix.python }}-${{ matrix.platform.name }}
-          path: wheelhouse/*.whl
+          path: wheelhouse/falcon-*.whl
 
   publish-sdist:
     name: publish-sdist
@@ -148,14 +156,14 @@ jobs:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           files: 'dist/*.tar.gz'
 
-      - name: Publish sdist to TestPyPI
+      - name: Publish sdist and pure-Python wheel to TestPyPI
         uses: pypa/gh-action-pypi-publish@release/v1
         if: github.event_name == 'workflow_dispatch'
         with:
           password: ${{ secrets.TEST_PYPI_TOKEN }}
           repository-url: https://test.pypi.org/legacy/
 
-      - name: Publish sdist to PyPI
+      - name: Publish sdist and pure-Python wheel to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
         if: github.event_name == 'release'
         with:
@@ -191,14 +199,14 @@ jobs:
         run: |
           tools/check_dist.py ${{ github.event_name == 'release' && format('-r {0}', github.ref) || '' }}
 
-      - name: Publish wheels to TestPyPI
+      - name: Publish binary wheels to TestPyPI
         uses: pypa/gh-action-pypi-publish@release/v1
         if: github.event_name == 'workflow_dispatch'
         with:
           password: ${{ secrets.TEST_PYPI_TOKEN }}
           repository-url: https://test.pypi.org/legacy/
 
-      - name: Publish wheels to PyPI
+      - name: Publish binary wheels to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
         if: github.event_name == 'release'
         with: