Add 'plocate' to 'astyanax' host

hosts/astyanax/configuration.nix

@@ -1,4 +1,4 @@
-{ ... }:
+{ pkgs, ... }:
 
 {
   system.stateVersion = "25.05";
@@ -48,4 +48,9 @@
     enable = true;
     openDefaultPorts = true;
   };
+
+  services.locate = {
+    enable = true;
+    package = pkgs.plocate;
+  };
 }