Show packages count divided by package manager

[cinghioGithub]

Description

This PR changes the output provided by dividing the number of installed packages by package managers. It also adds support for flatpak and snap package count.

Reason and / or context

These changes allow to count flatpak and snap packages, also changing the total package count, moving from a total number to more precise data, showing the number of packages for each available package manager.

Example:

                                       User: username
                                       Hostname: hostname
                                       Model: machine_model
             ..vvAAAvv..               Distro: Ubuntu 22.04.4 LTS x86_64
        .:s/OOOOOOOOOOOOO\s:.          Kernel: Linux 6.8.0
      .sOOOOOOOOOOOOOO.vv.OOOs.        Uptime: 3 minutes
    .sOOOOOOOOO,ssssn:lMMl:OOOOs.      Load Average: 0.07 0.12 0.09
   :OOOOOOO.n@'MMMMMMy\^^/.OOOOOO:     Processes: 168
  :OOOOOOOiMMj@"OOOO"YIOOIlOOOOOOO:    Window Manager: Not detected
 .OOOOOO.MMMiOOOOOOOOOO`WMMM:OOOOOO.   Desktop Environment: GNOME
 iOO.vv.OJMWOOOOOOOOOOOOO:MMM:OOOOOi   Shell: /bin/bash
 OO:MMMM:lI:OOOOOOOOOOOOOii+iiOOOOOO   Terminal: xterm-256color ██ ██ ██ ██ ██ ██ ██
 iOO'YY'OJMMOOOOOOOOOOOOO:MMM:OOOOOi   Packages: (dpkg) 1432, (snap) 12
 'OOOOOO'MMMiOOOOOOOOOOO,MMMiOOOOOO'   Temperature: Not detected
  :OOOOOO'iMMY@,OOOOOO,;MMM/OOOOOO:    CPU: 13th Gen Intel(R) Core(TM) i9-13900H
   :OOOOOOO"Y@AMivviiY'__`'OOOOOO:     GPU: Red Hat, Inc. QXL paravirtual graphic card
    'QOOOOOOOO'"YYYYKOaMMM:OOOOP'      RAM: 1630 MiB / 3924 MiB
      'QOOOOOOOOOOOOOO`YY'OOOP'        Disk: 37.8 GiB / 88.0 GiB
        ':QOOOOOOOOOOOOOOOQ:'          LAN IP: 192.168.1.2
            '"":YOOOY:""'              WAN IP: Not detected

How has this been tested ?

It has been tested by updating the project's unittest suite.

Types of changes :

• Bug fix (non-breaking change which fixes an issue)
• Typo / style fix (non-breaking change which improves readability)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist :

• I have updated the README.md file accordingly ;
• I have updated the test cases (which pass) accordingly ;
• This pull request targets next Archey version branch ;
• My changes looks good ;
• I agree that my code may be modified in the future ;
• My code follows the code style of this project (PEP8).

[HorlogeSkynet]

Hello @cinghioGithub, and many thanks for your PR (it was actually a long-term idea to change back-end for this purpose).
Some notes :

• I've cleaned up your branch a bit, mainly to simplify module, add some configuration, improve API and extends tests ;
• I've added this PR to v4.15 milestone (this is API-breaking, so let's (partially) honor SemVer here) ;
• (@ingrinder sorry, not sorry : another complex rebase here for [Output/Entry] Changes entries output method to pretty_value property #147 😕) ;
• EDIT : I've added an option to enable previous behavior with total count.

Tell me what you think about this final implementation ! Bye 👋

[HorlogeSkynet]

Up @cinghioGithub ! 🙏

[cinghioGithub]

Hi @HorlogeSkynet, sorry for the delay. I looked and everything seemed ok. I just don't know how much can be useful the show_zeros configuration option, but it is false by default so I like it. Thanks for fixing the style and adjusting the configuration as well.

[HorlogeSkynet]

I just don't know how much can be useful the show_zeros configuration option, but it is false by default so I like it.

I guess it could make sense to identify package manager back-ends that are not useful (no packages installed). Somehow, the option didn't cost much 🙃

Thanks for your feedback. Merging here.