Add grid planner, CI, and tests

.github/workflows/ci.yml

@@ -0,0 +1,23 @@
+name: CI
+
+on:
+  push: {}
+  pull_request: {}
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.11
+      - name: Install runtime dependencies
+        run: python -m pip install --upgrade pip && pip install -r requirements.txt
+      - name: Install dev dependencies
+        run: pip install -r requirements-dev.txt
+      - name: Run lints
+        run: ruff check server skill tests
+      - name: Run tests
+        run: pytest