feat: add a just setup command for setting up nix (#48)

* feat: add nix install script from bluefin / dnkmmr

* feat: add nix-me-up just cmd from bluefin

* feat: just update nix if installed

* feat: add nix-app-icons.sh
enables desktop icon support by adding to XDG_DATA_DIRS

* chore: remove nix update for now
this will be added in a later PR

etc/justfile

@@ -56,8 +56,18 @@ setup-gaming:
   flatpak override com.usebottles.bottles --user --filesystem=xdg-data/applications 
   flatpak override --user --env=MANGOHUD=1 com.valvesoftware.Steam 
   flatpak override --user --env=MANGOHUD=1 com.heroicgameslauncher.hgl 
- 
+
+nix-me-up:
+  echo 'Setting phasers to kill. Installing nix.'
+  /usr/bin/ublue-nix-install
+
 update:
+  #!/bin/bash
+  echo "Staging system update..."
   rpm-ostree update
+
+  echo "Updating Flatpaks..."
   flatpak update -y
-  distrobox upgrade -a
+
+  echo "Updating Distroboxes..."
+  distrobox upgrade -a