document binlog protocol

[sidorares]

we need some minimal instructions covering binlog setup and API documentations

binlog installation instructions: https://github.com/nevill/zongji#installation

some usage: https://github.com/sidorares/node-mysql2/blob/956c7ab994f7c9fd7cd350fb66a77fa8cb124127/website/docs/examples/binlog-watcher.mdx#L10-L29

most of the current usage derived from zongji client, need to think how to make transition easier ( or add compatibility api )

[sidorares]

reason for this issue: https://github.com/sidorares/node-mysql2/discussions/2304