added tests for notebooks

.github/workflows/ci.yaml

@@ -31,6 +31,13 @@ jobs:
         run: |
           coverage run --include='flow_matching/**/*.py' -m unittest discover tests -v
 
+      - name: Run notebook tests
+        run: |
+          pip install jupyter
+          for file in examples/*.ipynb; do
+            jupyter nbconvert --execute --ExecutePreprocessor.timeout=300 "$file"
+          done
+
       - name: Docstring Lint
         shell: bash -l {0}
         run: |