Advanced example with streaming INSERT

[mshustov]

We currently provide examples for streaming from file https://github.com/ClickHouse/clickhouse-js/blob/72f490a6faf894deb723f2c6d5b7cdee75177def/examples/node/insert_file_stream_ndjson.ts

However, the examples don't cover a use case when a user app pushes to the values stream and should handle the backpressure mechanism correctly. If user app doesn't implement backpressure handling, it might lead to problems like these #135