Feature Request: summary output

[gregneagle]

When I use pkgcheck to check all the pkgs and dmgs (thousands!) in my Munki repo, there's a lot of output to sort through.

It would be nice if there was a summary output at the end, perhaps divided by issue:

Unsigned packages
--------------------
/path/to/foo.pkg
/path/to/bar.pkg

Packages without notarization
------------------------------
/path/to/foo.pkg
/path/to/bar.pkg

Packages containing Python scripts
------------------------------------
/path/to/baz.pkg

etc. This would make it easier to focus on items that might need action, filter out the pkgs that have no identified issues, and for the admin to ignore the issues they don't care about (like I don't currently care about signing/notarization for pkgs installed by Munki)