Copies a file or a directory.
This function's path can be relative to the project root folder or be an absolute path.
All file separators should be forward ones "/".
Make sure to include the name of the files or directories at the end of the "to" argument.
@MenuItem ("Example/Copy Something")
static function CopyAFile () {
// copies the file "YourFileOrFolder" from "path/" to "copy/path/"
FileUtil.CopyFileOrDirectory ("path/YourFileOrFolder", "copy/path/YourFileOrFolder");
}