epyc: add nix-top

modules/packages.nix

@@ -35,6 +35,8 @@
     usbutils
 
     ipmitool
+
+    nix-top
     # tries to default to soft-float due to out-dated cc-rs
   ] ++ lib.optional (!stdenv.hostPlatform.isRiscV) bandwhich;
 }