Abs is similar to filepath.Abs but it allows you to pass a custom wd.

copy directory will copy all of the contents of one directory into another directory.

CopyFiles takes a list of absolute paths to files and copies them into another directory, maintaining structure.

DirExists will only return true if the path exists and is a directory.

FileExists will only return true if the path is a file, not a directory.

PathWithinDir checks if a path is within a given directory.