fix: move fhs to be specific to home-manager per user

specific/desktop/home-manager.nix

@@ -79,6 +79,36 @@
 
   home.packages = with pkgs; [
     pcsx2
+
+    # Create an FHS environment using the command `fhs`, enabling the execution of non-NixOS packages in NixOS!
+    (
+      let
+        base = appimageTools.defaultFhsEnvArgs;
+      in
+      buildFHSUserEnv (
+        base
+        // {
+          name = "fhs";
+          targetPkgs =
+            pkgs:
+            (
+              # pkgs.buildFHSUserEnv provides only a minimal FHS environment,
+              # lacking many basic packages needed by most software.
+              # Therefore, we need to add them manually.
+              #
+              # pkgs.appimageTools provides basic packages required by most software.
+              (base.targetPkgs pkgs)
+              ++ (with pkgs; [
+                nodejs
+                dotnet-sdk_8
+              ])
+            );
+          profile = "export FHS=1";
+          runScript = "bash";
+          extraOutputsToInstall = [ "dev" ];
+        }
+      )
+    )
   ];
 
   #