feat: updated function calling example

.gitignore

coverage.xml

docs/examples/function_calling.ipynb

docs/examples/test.ann

poetry.lock

semantic_router/encoders/__init__.py

semantic_router/encoders/fastembed.py

semantic_router/layer.py

semantic_router/route.py

semantic_router/schema.py

semantic_router/utils/function_call.py

semantic_router/utils/splitters.py

tests/unit/test_layer.py

tests/unit/test_splitters.py