Move system/home/default.nix into system/default.nix,
system/home/desktop/default.nix into system/desktop.nix to reduce
unnecessary duplication. Moved everything in home/desktop up to home/
and adjusted paths accordingly. Moved wallpapers up to system/ since
it makes sense with where it's used.
Merge allowUnfreePredicate into single place again since it seems to
override rather than combine if used multiple times.
Install NoMachine on all machines again by default.
Move steam config to separate file, import by Vanguard.
Move work config up one level (system rather than home) to config
allowUnfreePredicate for NoMachine.
Install teams and twinkle on desktop by default.
Evie Litherland-Smith