ci: add GitHub Actions to run tests + smoke quickstart (py3.10/3.11)

Author: BryceWDesign

.github/workflows/tests.yml

@@ -0,0 +1,39 @@
+name: tests
+
+on:
+  push:
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['3.10', '3.11']
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+          cache: 'pip'
+
+      - name: Install test/deps
+        run: |
+          python -m pip install --upgrade pip
+          pip install pytest pyyaml
+
+      - name: Run unit tests
+        run: |
+          pytest -q
+
+      - name: Quickstart smoke (scene → nudge → plan → safety)
+        run: |
+          python examples/quickstart.py --scene sim/scenes/basic_room.json --verbose