fix(nix): replace nodePackages.eslint/prettier with top-level equivalents (#167)

Co-authored-by: abosio <abosio@sixfeetup.com>

Author: abosio

template/flake.nix

@@ -48,8 +48,8 @@
             kubernetes-helm
             kubeseal
             nodejs_22
-            nodePackages.eslint
-            nodePackages.prettier
+            eslint
+            prettier
             openssh
             opentofu
             pass