treewide: use lib.mkDefault for "collateral" config

this allows the user to override settings without lib.mkForce,
since that should only be needed for potentially unadvisable changes

cli/default.nix

@@ -56,7 +56,7 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    nixowos.${name} = {
+    nixowos.${name} = lib.mkDefault {
       yt-dlp.enable = true;
       tmux.enable = true;
       shell.enable = true;

default.nix

@@ -22,9 +22,11 @@ in
   config = {
     _module.args.owoLib = pkgs.callPackage ./lib { };
 
-    nixowos = lib.mkIf cfg.enable {
-      cli.enable = true;
-      system.enable = true;
-    };
+    nixowos = lib.mkIf cfg.enable (
+      lib.mkDefault {
+        cli.enable = true;
+        system.enable = true;
+      }
+    );
   };
 }

graphical/default.nix

@@ -23,7 +23,7 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    nixowos.${name} = {
+    nixowos.${name} = lib.mkDefault {
       plasma.enable = config.services.desktopManager.plasma6.enable;
       mpv.enable = true;
     };

graphical/games/default.nix

@@ -19,7 +19,7 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    nixowos.graphical.${name} = {
+    nixowos.graphical.${name} = lib.mkDefault {
       mangohud.enable = true;
       steam.enable = true;
     };

system/default.nix

@@ -28,7 +28,7 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    nixowos.${name} = {
+    nixowos.${name} = lib.mkDefault {
       lix.enable = true;
       nix.enable = true;
       luks.enable = true;