[chore] Add config for new nix box.

hosts/devbox/home.nix

@@ -1,4 +1,11 @@
-{ lib, inputs, config, pkgs, ssh-agent-switcher, ... } :
+{ lib,
+  inputs,
+  config,
+  pkgs,
+  ssh-agent-switcher,
+  user,
+  ...
+} :
 let
   pathToKeys = ../common/keys/yubi;
   yubiKeys =
@@ -9,6 +16,8 @@ let
       (key: { ".ssh/${key}.pub".source = "${pathToKeys}/${key}.pub"; })
       yubiKeys
   );
+  username = user.name;
+  homeDirectory = user.homeDirectory;
 in {
 
   imports = [
@@ -31,8 +40,8 @@ in {
   ghostty.window-decoration = false;
 
   home = {
-    username = "jmug";
-    homeDirectory = "/home/jmug";
+    username = username;
+    homeDirectory = homeDirectory;
 
     packages = with pkgs; [
       # Media