Move Nix files back to the root of the project

hosts/t480/services/default.nix

@@ -0,0 +1,31 @@
+{
+  imports = [
+    ./cron.nix
+    ./interception-tools.nix
+    ./redshift.nix
+    ./sound.nix
+    ./udev.nix
+    ./xserver.nix
+  ];
+
+  services = {
+    auto-cpufreq.enable = true;
+
+    avahi = {
+      enable = true;
+      nssmdns4 = true;
+      openFirewall = true;
+    };
+
+    blueman.enable = true;
+
+    gvfs.enable = true;
+    openssh.enable = true;
+    power-profiles-daemon.enable = false;
+    printing.enable = true;
+    pulseaudio.enable = false;
+    throttled.enable = true;
+    thermald.enable = true;
+    upower.enable = true;
+  };
+}