started modifing configuration structure

system/services/default.nix

@@ -0,0 +1,12 @@
+{ ... }: {
+  imports = [
+    ./cups
+    ./flatpak
+    ./libvirtd
+    ./podman
+    ./polkit
+    ./ssh
+    ./steam
+    ./tailscale
+  ];
+}