function Deno.readDir
          
readDir(path: string | URL): AsyncIterable<DirEntry> 
      Reads the directory given by path and returns an async iterable of
Deno.DirEntry. The order of entries is not guaranteed.
for await (const dirEntry of Deno.readDir("/")) { console.log(dirEntry.name); }
Throws error if path is not a directory.
Requires allow-read permission.
AsyncIterable<DirEntry>