Add Pacman Frontend Support

[gjhklfdsa]

Description: Add support for Pacman
How?: There are already a variety of tools utilized for Pacman like Octopi. This would help create one universal package management tool.
But isn't Pacman only for Arch? It also works on most forks like Parabola.
However, in theory you could always check if Pacman is installed.

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[cadamsdev]

This would need to be added in the desktop version, but this won't be added anytime soon. The current focus is on improving the UI, desktop version and installing/uninstalling (AppImage, Flatpak, and Snaps) after that I have planned support for deb, rpm packages.