This PR adds a new .sql tagged template to the database class. It allows users to easily run one-off SQL queries with parameters bounded with a tagged templated. Parameters are safely encoded as ? and bounded after the statement is prepared, meaning there's no possibility of SQL injection.

db.sql`create table students(id, name)`;

const student = {id: 1, name: "Alex"};
db.sql`insert into students values (${student.id}, ${student.name})`;

db.sql`select * from students where id > ${0}`; // [ {"id": 1, "name": "Alex"} ]

The .sql tagged template returns all the rows returned by the query, calling .all() under the hood.

The function is inspired by, and has a very similar API to these other libraries:

• Observable's DatabaseClient: https://observablehq.com/@observablehq/stdlib#cell-1749
• postgres.js: https://observablehq.com/@observablehq/stdlib#cell-1749
• Vercel postgres: https://vercel.com/docs/storage/vercel-postgres/sdk#sql