Load all skills from a directory. Each skill is a folder in it; an entry
whose name starts with a dot, and one that is not a folder, is passed over,
and a symbolic link is passed over with a warning.
Parameters
dir: string
Parent directory containing skill subdirectories. It may be a
symbolic link.
Load all skills from a directory. Each skill is a folder in it; an entry whose name starts with a dot, and one that is not a folder, is passed over, and a symbolic link is passed over with a warning.