Add the funny scratch shell command

Author: RossSmyth

home-manager/home.nix

@@ -103,6 +103,7 @@
         nxedit = "${config.home.sessionVariables.EDITOR} ${config.xdg.configHome}/nix";
         getLargest = "${lib.getExe pkgs.fd} -t file . --exec ls -s | sort -nr | head-n20";
         dev = "nix develop --command ${lib.getExe pkgs.fish}";
+        scratch = ''systemd-run --property=PrivateTmp=true --description "scratch shell" --user --collect --shell --working-dir "/var/tmp"'';
       };
     };