feat(printing): add system-config-printer

how could i live without this?

.bin/filli-report

@@ -0,0 +1,4 @@
+#!/bin/sh
+hora reg 'miaengiadina|fysi|filli' -O csv \
+  -b "$(date -d "$(date +%Y-%m)-20 last month" +%Y-%m-%d)" \
+  -e "$(date -d "$(date +%Y-%m)-19" +%Y-%m-%d)"

configs/printing.nix

@@ -12,6 +12,13 @@ in {
     extraBackends = [hp-driver];
   };
 
+  environment.systemPackages = [
+    pkgs.system-config-printer
+  ];
+
+  # allow connecting to .local printers
+  services.avahi.nssmdns = true;
+
   hardware.printers.ensurePrinters = [
     {
       name = "OfficeJet";