ci: run examples in test workflow

Add step to run example scripts as tests in CI to prevent examples
from growing stale.

Signed-off-by: Daniel Bluhm <dbluhm@pm.me>

Author: dbluhm

.github/workflows/tests.yml

@@ -22,3 +22,5 @@ jobs:
         run: uv sync --all-extras
       - name: Run pytest
         run: uv run pytest
+      - name: Run examples
+        run: uv run pytest examples/