split cookbook examples into snippets

docs/site/docs/cookbook/acknowledgements.mdx

docs/site/docs/cookbook/datasets.mdx

docs/site/docs/cookbook/metadata.mdx

docs/site/docs/cookbook/next_stream.mdx

docs/site/docs/cookbook/query.mdx

docs/site/docs/cookbook/simple-consumer.mdx

docs/site/docs/cookbook/simple-pipeline.mdx

docs/site/docs/cookbook/simple-producer.mdx

docs/site/docusaurus.config.js

docs/site/examples/c/consume.c

docs/site/examples/cpp/acknowledgements.cpp

docs/site/examples/cpp/consume.cpp

docs/site/examples/cpp/consume_dataset.cpp

docs/site/examples/cpp/metadata.cpp

docs/site/examples/cpp/next_stream.cpp

docs/site/examples/cpp/pipeline.cpp

docs/site/examples/cpp/produce.cpp

docs/site/examples/cpp/produce_dataset.cpp

docs/site/examples/cpp/query.cpp

docs/site/examples/python/acknowledgements.py