Refactor user management functions to use inputs

Removed the `lib.nix` file and refactored various modules to utilize `inputs.self.lib` for user package and attribute management. This change enhances consistency and maintainability across the configuration files.

modules/apps/gaming.nix

@@ -1,6 +1,6 @@
 {
-  inputs,
   config,
+  inputs,
   lib,
   pkgs,
   ...
@@ -51,7 +51,6 @@ in
       # };
     };
     users.users = let
-      userLib = import ../lib.nix { inherit lib; };
       packages = builtins.attrValues {
         inherit retroarchWithCores;
         inherit (pkgs)
@@ -70,6 +69,6 @@ in
           prismlauncher # minecraft launcher with jdk overlays
           ;
       };
-    in userLib.mkUserPackages config.my.toggleUsers.apps packages;
+    in inputs.self.lib.mkUserPackages lib config.my.toggleUsers.apps packages;
   };
 }