Update home impermanence to be in the style of GNU Stow

modules/home/settings/impermanence/default.nix

@@ -2,23 +2,24 @@
 {
   imports = [ impermanence.homeManagerModules.default ];
 
-  home.persistence."/persist${config.home.homeDirectory}" = {
+  home.persistence."${config.xdg.userDirs.extraConfig.XDG_PERSIST_DIR}" = {
     enable = !config.targets.genericLinux.enable;
-    directories = [
-      "Keepers"
-      "Projects"
-
-      ".gnupg"
-      ".local/state/nix/profiles"
-      ".ssh"
-    ] ++ (if config.home.desktop.enable then [
-      "Documents"
-      "Photos"
-      "Videos"
-      "Games"
-
-      ".local/state/wireplumber"
-    ] else []);
     allowOther = false;
+    removePrefixDirectory = true;
+    directories = [
+      "home/Keepers"
+      "home/Projects"
+
+      "nix/.local/state/nix/profiles"
+      "secure/.ssh"
+    ] ++ (if config.home.desktop.enable then [
+      "home/Documents"
+      "home/Games"
+      "home/Photos"
+      "home/Videos"
+
+      "secure/.pki"
+      "state/.local/state/wireplumber"
+    ] else []);
   };
 }