Behavior Change: Protect all comments before the first import (assume they're pragmas/top-of-file)

[fbartho]

In #54 (comment) we decided to protect top-of-file (before-first-import) comments more aggressively.

Unhappy Test Case:

/**
 * @prettier
 */
import { b } from 'b';
import type { A } from 'a';
import { a } from 'a';

// Should not become: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

import { a, type A } from "a";
/**
 * @prettier
 */
import { b } from "b";