chore(action): collates wheels into one downloadable for manual release

.github/workflows/wheels.yml

@@ -48,3 +48,27 @@ jobs:
         with:
           name: cibw-wheels-${{ matrix.only }}
           path: ./wheelhouse/*.whl
+
+  collate-wheels:
+    name: Collate all wheels
+    needs: build_wheels
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Download all wheel artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: wheelhouse
+
+      - name: Compress wheels
+        run: |
+          tar -czvf wheels-archive.tar.gz -C wheelhouse .
+          zip -r wheels-archive.zip wheelhouse
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: wheels-archive
+          path: |
+            wheels-archive.tar.gz
+            wheels-archive.zip