The intent of File::ShareDir is to provide a companion to Class::Inspector
and File::HomeDir, modules that take a process that is well-known by
advanced Perl developers but gets a little tricky, and make it more
available to the larger Perl community.

Quite often you want or need your Perl module (CPAN or otherwise) to have
access to a large amount of read-only data that is stored on the
file-system at run-time.

On a linux-like system, this would be in a place such as /usr/share,
however Perl runs on a wide variety of different systems, and so the use
of any one location is unreliable.