Add custom impermanence module

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

hosts/common/user/configs/gui/ags/default.nix

@@ -1,5 +1,6 @@
 {
-  username ? throw "username argument is required",
+  user ? throw "user argument is required",
+  home ? throw "home argument is required",
 }:
 {
   config,
@@ -9,16 +10,15 @@
   ...
 }:
 let
-  hmConfig = config.home-manager.users.${username};
   agsConfig = import ./config { inherit pkgs; };
 in
 {
-  home-manager.users.${username} = {
+  home-manager.users.${user} = {
     imports = [ inputs.ags.homeManagerModules.default ];
 
     programs.ags.enable = true;
     xdg.configFile."ags/config.js".source = "${agsConfig}/share/config.js";
-    theme.templates."${hmConfig.xdg.configHome}/ags/theme.sass".source = ./theme.sass;
+    theme.templates."${home}/.config/ags/theme.sass".source = ./theme.sass;
 
     systemd.user = {
       targets.tray.Unit = {