refactor: restructure config files

modules/capabilities/printing.nix

@@ -0,0 +1,14 @@
+{
+  flake.modules.nixos.printing =
+    { pkgs, ... }:
+    {
+      services.printing = {
+        enable = true;
+        drivers = with pkgs; [
+          cups-filters
+          cups-browsed
+          cnijfilter2
+        ];
+      };
+    };
+}