Feature request - simple interface to ask for cost, independent of graphql server

[tot-ra]

What is the best way to ask from costAnalysis API what is the cost, without any graphql server instance?

We're resorting currently to this, but would be nice to have easy API to get the cost..

const { validate, parse, ValidationContext, TypeInfo } = require('graphql');
const costAnalysis = require('graphql-cost-analysis').default;

function getCurrentCost(query, schema, variables) {
	const queryAST = parse(query);
	const validationContext = new ValidationContext(schema, queryAST, new TypeInfo(schema));
	const costAnalyser = costAnalysis({ variables, ...costLimits })(validationContext);

	validate(schema, queryAST, [() => costAnalyser]);

	return costAnalyser.cost;
}