fix(emacs): persist personal libenchant dictionary

modules/home/users/msyds/emacs/nix/jinx.nix

@@ -13,6 +13,13 @@ in {
           en en-computers en-science
         ]);
     in {
+      sydnix.impermanence.directories =
+        let xdg-config-home =
+          lib.removePrefix "${config.home.homeDirectory}/"
+            (lib.removePrefix "~/"
+              config.xdg.configHome);
+        in [ "${xdg-config-home}/enchant" ];
+
       sydnix.emacs = {
         emacsPackages = epkgs: [
           epkgs.jinx