@std/fs/exists returns true when a path is inaccessible.

**Describe the bug**

@std/fs/exists returns true when a path is inaccessible.

**Steps to Reproduce**

```
$ ls /root
ls: cannot open directory '/root': Permission denied
$ cat test.ts
import { exists } from "jsr:@std/fs@^1.0.15";

console.log(await exists("/root/foo"))
$ deno run --allow-read test.ts
true
$
```

**Expected behavior**

Throw an error. Maybe a `Deno.errors.PermissionDenied` like `Deno.readDir("/root")`?

**Environment**

- OS: Fedora 41
- deno version: 2.2.6
- std version: 1.0.15