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-install-xbox-controllers

@@ -1,19 +1,23 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-# Install support for using Xbox controllers with Steam/RetroArch/etc.
+# Configure Xbox Controller support (xpadneo) declaratively for Nomarchy NixOS.
 
-set -e
+FEATURE_FILE="/etc/nixos/nomarchy-features/xbox-controller.nix"
 
-# Install xpadneo to ensure controllers work out of the box
-nomarchy-pkg-add linux-headers
-nomarchy-pkg-aur-add xpadneo-dkms
+if [ -f "$FEATURE_FILE" ]; then
+    echo "Xbox controller support is already configured in $FEATURE_FILE"
+    exit 0
+fi
 
-# Prevent xpad/xpadneo driver conflict
-echo blacklist xpad | sudo tee /etc/modprobe.d/blacklist-xpad.conf >/dev/null
-echo hid_xpadneo | sudo tee /etc/modules-load.d/xpadneo.conf >/dev/null
+sudo mkdir -p "/etc/nixos/nomarchy-features"
+cat <<EOF | sudo tee "$FEATURE_FILE" > /dev/null
+{ config, pkgs, ... }:
+{
+  hardware.xpadneo.enable = true;
+  # Note: This automatically handles blacklisting xpad if needed and provides modules.
+}
+EOF
 
-# Give user access to game controllers
-sudo usermod -a -G input $USER
-
-# Modules need to be loaded
-gum confirm "Install requires reboot. Ready?" && sudo reboot now
+echo "Created $FEATURE_FILE."
+echo "IMPORTANT: To finish enabling Xbox controller support, add './nomarchy-features/xbox-controller.nix' to your imports list in /etc/nixos/system.nix or /etc/nixos/flake.nix,"
+echo "then run 'sys-update'."