Split up painless.software into separate roles

[bittner]

Currently, it's difficult to easily configure which software should be installed by the role painless.software.

The easiest, but cumbersome to remember, approach currently is to use tags, as explained in the README.

Splitting up the role into separate roles that are meant to be individually included will make it more straight-forward to configure a setup, e.g.

# FILE: playbook.yml
---
- hosts: foo
  vars:
    - painless_printer_name: samsung-clx7110
  roles:
    - painless.software-desktop
    - painless.software-devices
    - painless.software-virtualization
    - painless.gnome

To ensure that these roles continue to be installed easily with a single command we need to develop a collection (ansible-galaxy collection init), which can contain several roles and can be installed (ansible-galaxy collection install) and included in a playbook almost as easily as a role.