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/office.nix

@@ -1,5 +1,6 @@
 {
   config,
+  inputs,
   lib,
   pkgs,
   ...
@@ -9,7 +10,6 @@
   config = lib.mkIf config.my.apps.office.enable {
     environment.variables.CALIBRE_USE_SYSTEM_THEME = "1";
     users.users = let
-      userLib = import ../lib.nix { inherit lib; };
       packages = builtins.attrValues {
         inherit (pkgs)
           jre17_minimal # for libreoffice extensions
@@ -20,6 +20,6 @@
           # planify # let's pretend I will organize my tasks
           ;
       };
-    in userLib.mkUserPackages config.my.toggleUsers.apps packages;
+    in inputs.self.lib.mkUserPackages lib config.my.toggleUsers.apps packages;
   };
 }