vfs: ZipProvider allows creating entries beneath non-directory parents

Version

main

Platform

macOS

Subsystem

vfs

What steps will reproduce the bug?

import { createZipArchive, ZipBuffer, ZipEntry } from 'node:zlib';
import { create, ZipProvider } from 'node:vfs';

const zipEntry = await ZipEntry.create('file.txt', Buffer.from('contents'));
const zipArchive = createZipArchive([zipEntry]);
const archive = Buffer.concat(await Array.fromAsync(zipArchive));
const fs = create(new ZipProvider(new ZipBuffer(archive)));

try {
  await fs.promises.writeFile('/file.txt/child.txt', 'hello');
  console.log('write succeeded');
} catch (error) {
  console.log(`${error.code}: ${error.message}`);
}

How often does it reproduce? Is there a required condition?

Always

What is the expected behavior? Why is that the expected behavior?

It should fail with ENOTDIR

What do you see instead?

write succeeded

The write incorrectly succeeds even though file.txt is not a directory

Additional information

No response