Rule suggestion: prefer node: prefixed imports when possible

[JoshuaKGoldberg]

Older built-in Node modules such as fs now can be imported via either their name or node: + their name:

import fs from "fs";
import fs from "node:fs";

The prefixed versions are nice because they can't be overridden by user modules and are similarly formatted to to prefix-only modules such as node:test.

Suggestion: let's add a linter rule to enforce using them, with an auto-fixer?