[nix] Add xplr and syncthing

dot_config/nixpkgs/home.nix

@@ -94,6 +94,7 @@ in
       unstable.pkgs.logseq
       unstable.pkgs.pynitrokey
       unstable.pkgs.nitrokey-app
+      pkgs.xplr
       pkgs.ntfy-sh
       pkgs.jless
       pkgs.yq-go
@@ -656,6 +657,10 @@ in
     };
   };
 
+  services.syncthing = {
+    enable = true;
+  };
+
   services.mbsync.enable = true;
   services.mbsync.verbose = false;
   services.gnome-keyring.enable = true;