add userspace yubi tools

modules/system/yubikey/default.nix

@@ -37,6 +37,12 @@ in {
   };
 
   config = lib.mkIf cfg.enable {
+
+    environment.systemPackages = with pkgs; [
+      yubikey-personalization
+      yubikey-manager
+    ];
+
     security.pam.services = lib.mkIf (cfg.mode == "u2f") {
       login.u2fAuth = true;
       sudo.u2fAuth = true;