Add GitHub action to run tests

.github/workflows/test.yml

@@ -0,0 +1,41 @@
+name: Test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  # Allow manual workflow triggering from the "Actions" tab.
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.9']
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v5
+      with:
+        version: "0.5.11"
+        enable-cache: true
+        cache-dependency-glob: "uv.lock"
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Install project
+      run: uv sync --frozen --only-group test
+
+    - name: Run tests
+      run: |
+        uv run pytest