- pack_property(?Pack, ?Property) is nondet
- True when Property is a property of an installed Pack. This
interface is intended for programs that wish to interact with the
package manager. Defined properties are:
- directory(Directory)
- Directory into which the package is installed
- version(Version)
- Installed version
- title(Title)
- Full title of the package
- author(Author)
- Registered author
- download(URL)
- Official download URL
- readme(File)
- Package
README file (if present)
- todo(File)
- Package
TODO file (if present)