Add custom impermanence module

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/user/configs/console/brightnessctl/default.nix

@@ -1,12 +1,13 @@
 {
-  username ? throw "username argument is required",
+  user ? throw "user argument is required",
+  home ? throw "home argument is required",
 }:
 { lib, pkgs, ... }:
 {
-  users.users.${username}.extraGroups = [
+  users.users.${user}.extraGroups = [
     "video"
     "inputs"
   ];
 
-  home-manager.users.${username}.home.packages = with pkgs; [ brightnessctl ];
+  home-manager.users.${user}.home.packages = with pkgs; [ brightnessctl ];
 }