chore: move validatePath function into lib

home/themes/catppuccin.nix

@@ -1,7 +1,11 @@
-{ pkgs, config, ... }:
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
 let
-  validatePath =
-    s: if (builtins.pathExists s) then (builtins.baseNameOf s) else throw "${s} does not exist";
+  inherit (lib.my) validatePath;
 in
 rec {
   qt.platformTheme.name = "gnome";

parts/lib/functions.nix

@@ -33,4 +33,7 @@
         username = "ny";
       };
     };
+
+  validatePath =
+    s: if (builtins.pathExists s) then (builtins.baseNameOf s) else throw "${s} does not exist";
 }