Include plain package lists in the output to have history

[asamalik]

Pushing package lists and the overall size as a plain text into git will give us a nice view into the history — we'll be able to see the package and size difference between any points in time.

And thanks to Pagure or Github, we'll get a free web UI for that!

Since all the results are already pushed to the reports repo, all that needs to happen is to output those lists.

The format could be as simple as:

< Use case name >
on < Base name >
42 MB
---
pkg1
pkg2
pkg3