Revert "feat: disable zen"

This reverts commit fe5ec24090.

modules/desktop/browser/all.nix

@@ -12,7 +12,7 @@ lib.my.makeSwitch {
       firefox.enable = true;
       librewolf.enable = true;
       chromium.enable = true;
-      zen.enable = false;
+      zen.enable = true;
     };
   };
 }