More SQL configuration options

[mbostock]

It’d be nice if there were a way to change these defaults when using SQL code blocks:

framework/src/client/stdlib/duckdb.js

Lines 165 to 170 in 97cc4b5

	if (config.query?.castTimestampToDate === undefined) {
	config = {...config, query: {...config.query, castTimestampToDate: true}};
	}
	if (config.query?.castBigIntToDouble === undefined) {
	config = {...config, query: {...config.query, castBigIntToDouble: true}};
	}