all application options will adapt to environment

when used either with nixos (no home-manager) or home-manager standalone, `features.applications.<name>.enable` options still perform some functionality, rather than assuming a full nixos + home-manager setup like before

modules/features/nixos/stylix.nix

@@ -6,10 +6,19 @@
 
     options.features.nixos.stylix.enable = lib.mkEnableOption "stylix";
 
-    config = lib.mkIf (config.features.nixos.stylix.enable) {
+    config = let
+      mkIfElse = with lib; p: yes: no: mkMerge [
+        (mkIf p yes)
+        (mkIf (!p) no)
+      ];
+    in lib.mkIf (config.features.nixos.stylix.enable) {
       stylix.enable = true;
       stylix.image = builtins.path { path = "${self}/modules/hosts/${config.info.hostName}/wallpaper.jpg"; };
       stylix.polarity = "dark";
     };
   };
+
+  flake.homeModules.graphics = { pkgs, lib, config, ... }: {
+    options.features.nixos.stylix.enable = lib.mkEnableOption "stylix";
+  };
 }