Add GitHub Actions CI/CD workflow for automated testing

- Add test.yml workflow to run tests on push and PR
- Test on Python 3.10, 3.11, and 3.12
- Use uv for dependency management in CI
- Addresses PR #14 review comment for CI/CD setup

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: ChanceSiyuan

.github/workflows/test.yml

@@ -0,0 +1,31 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main, feat/* ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10", "3.11", "3.12"]
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v4
+      with:
+        enable-cache: true
+
+    - name: Set up Python ${{ matrix.python-version }}
+      run: uv python install ${{ matrix.python-version }}
+
+    - name: Install dependencies
+      run: uv sync --dev
+
+    - name: Run tests
+      run: uv run pytest --verbose