Add hello.sh script + parametrize username

home.nix

@@ -1,16 +1,25 @@
-{ lib, pkgs, ... }:
-{
+{ lib, pkgs, ... }: let
+  username = "khais";
+in {
   home = {
     packages = with pkgs; [
       htop neofetch
     ];
 
     file = {
-      "hello.txt".text = "Hello, World!";
+      "hello.sh" = {
+        text = ''
+          #!/usr/bin/env bash
+
+          echo 'Hello, World!'
+          echo '*slaps roof* This script can fit so many lines in it!'
+        '';
+        executable = true;
+      };
     };
 
-    username = "khais";
-    homeDirectory = "/home/khais";
+    inherit username;
+    homeDirectory = "/home/${username}";
 
     stateVersion = "23.11";
   };