feat(system): professionalize system configurations

- Consolidate imperative system settings into /etc/nixos/state.json
- Implement nomarchy.system options for DNS, Wifi powersave, Timezone, and hardware features
- Add declarative browser policies for Chromium/Brave based on theme
- Update toggles scripts to mutate system JSON and run sys-update --impure
- Remove obsolete imperative browser theme and redundant system modules

bin/nomarchy-wifi-powersave

@@ -1,5 +1,17 @@
-#!/bin/bash
-for iface in /sys/class/net/*/wireless; do
-  iface="$(basename "$(dirname "$iface")")"
-  iw dev "$iface" set power_save "$1" 2>/dev/null
-done
+#!/usr/bin/env bash
+
+# Toggles wifi power saving declaratively.
+# Usage: nomarchy-wifi-powersave <on|off>
+
+STATE_FILE="/etc/nixos/state.json"
+
+case "$1" in
+on)  value="true" ;;
+off) value="false" ;;
+*) echo "Usage: nomarchy-wifi-powersave <on|off>"; exit 1 ;;
+esac
+
+sudo jq ".wifi.powersave = $value" "$STATE_FILE" > /tmp/state.json && sudo mv /tmp/state.json "$STATE_FILE"
+
+echo "Wifi powersave set to $1. Applying changes..."
+sudo sys-update