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:

node-mysql2/website/docs/examples/binlog-watcher.mdx

Lines 10 to 29 in 956c7ab

	'use strict';
	const mysql = require('mysql2');
	const through2 = require('through2');
	const binlogStream = mysql.createBinlogStream({
	serverId: 123, // slave ID, first field in "show slave hosts" sql response
	// you can also specify slave host, username, password and port
	masterId: 0,
	filename: 'mysql-bin.000007',
	binlogPos: 120,
	flags: 1, // 1 = "non-blocking mode"
	});
	binlogStream.pipe(
	through2.obj((obj, enc, next) => {
	console.log(obj);
	next();
	})
	);

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: #2304