Function directory_is_empty 

pub fn directory_is_empty(path: &str) -> bool

Checks if a directory is empty and returns a boolean based on success or failure.

Usage:

fsutils::mkdir("empty_directory");
fsutils::mkdir("full_directory");
fsutils::create_file("full_directory/a_file.txt");
fsutils::create_file("full_directory/another_file.txt");

assert_eq!(fsutils::directory_is_empty("full_directory"), false);
assert_eq!(fsutils::directory_is_empty("empty_directory"), true);