fix(impermanence): keep spell files for nvim

hosts/nixos-laptop/default.nix

@@ -29,7 +29,7 @@
         name = "zfs-diff";
         runtimeInputs = with pkgs; [ zfs coreutils parallel tree ];
         text = ''
-          sudo zfs diff zroot/encrypted/root@blank | cut -f2 | parallel 'test -e /persist/{} || echo {}' | tree --fromfile .
+          zfs diff -F zroot/encrypted/root@blank | awk '$2 == "F" && system("test -e /persist/"$3) != 0 { print $3 }' 2>/dev/null | tree --fromfile . "$@"
         '';
       }
     )

hosts/nixos-laptop/impermanence.nix

@@ -38,6 +38,7 @@
         ".config/Nextcloud"
         ".config/keepassxc"
         ".local/share/direnv"
+        ".local/share/nvim"
         ".local/share/zoxide"
         ".local/state/nvim"
         ".mozilla"