readdir using option withFileTypes: true

[prettydiff]

Investigate using option withFileTypes on readdir in the directory.ts file for performance and simplicity.

[prettydiff]

Even on the returned Dirent types you must still call the type checking methods to determine the file system artifact type. As a result there is no value gain here.

https://nodejs.org/dist/latest-v20.x/docs/api/fs.html#class-fsdirent

Interestingly there is now a recursive option as of Node version 20.1.0. With that option I may not have starting writing this library (7 or 8 years ago) and thus not this project. The recursive option cannot be used now as it would break the depth option this project provides.