ci: add GitHub Actions workflow for testing

Co-Authored-By: Claude Code <noreply@anthropic.com>
Co-Authored-By: glm-5 <service@zhipuai.cn>

Author: 3 people

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI
+
+permissions:
+  contents: read
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+  workflow_dispatch:
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Install Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+
+      - name: Install basis_set_exchange
+        run: pip install basis_set_exchange
+
+      - name: Generate Python reference files
+        working-directory: tests/python_ref
+        run: |
+          for i in *.py; do python "$i"; done
+
+      - name: Run cargo test
+        run: cargo test