[actix-files: feature request] List all disks on Windows.

[xb284524239]

When I specify serve_from as "/", on Unix-like systems, this will list all top-level subdirectories under the root directory. However, on Windows, it will only list the top-level subdirectories within the disk where the program is located.
On the Windows system, is there any way to make actix-files list all disks?

let app = App::new().service(Files::new("/all-files", "/").prefer_utf8(true));

This image shows the effect I want to achieve.