feat: implement modular foundation and core system services

- Update flake.nix with 25.11 release and core inputs
- Add dedicated modules for audio (Pipewire), bluetooth, and networking
- Update GEMINI.md with the new Modular Merging Architecture blueprint
- Configure graphical installer ISO and test VM outputs

bin/nomarchy-update-aur-pkgs

@@ -1,13 +1,5 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-# Update AUR packages if any are installed
-if pacman -Qem >/dev/null; then
-  if nomarchy-pkg-aur-accessible; then
-    echo -e "\e[32m\nUpdate AUR packages\e[0m"
-    yay -Sua --noconfirm --cleanafter --ignore gcc14,gcc14-libs
-    echo
-  else
-    echo -e "\e[31m\nAUR is unavailable (so skipping updates)\e[0m"
-    echo
-  fi
-fi
+echo "AUR is an Arch Linux concept and is not supported on NixOS."
+echo "Please use 'nomarchy-pkg-add' to install packages from nixpkgs."
+exit 1