Add a github actions workflow that will build wheels for Pgenlib pyth…

…on package.

.github/workflows/build_python_wheel.yaml

@@ -0,0 +1,38 @@
+# Builds Python wheels for Pgenlib
+
+# At this time, builds only on macOS aarch64
+# because of problems with symlinks and the 
+# dockerized cibuildwheel Linux build
+
+name: Build Python Wheel
+
+on: [push, pull_request]
+
+jobs:
+  build_wheels:
+    name: Build wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-14]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up QEMU for aarch64 emulation
+        if: runner.os == 'Linux'
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: all
+
+      - name: Build wheels
+        uses: pypa/[email protected]
+        with:
+          package-dir: './2.0/Python'
+        env:
+          CIBW_ARCHS_LINUX: auto aarch64
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: cibw-wheels-${{ matrix.os }}-${{ strategy.job-index }}
+          path: ./wheelhouse/*.whl