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-toggle-hybrid-gpu

@@ -3,20 +3,23 @@
 # Toggle dedicated vs integrated GPU mode via supergfxd (for hybrid gpu laptops, like Asus G14).
 # Declarative enablement + Runtime mode switching for Nomarchy NixOS.
 
-FEATURE_FILE="/etc/nixos/nomarchy-features/supergfxd.nix"
+STATE_FILE="/etc/nixos/state.json"
+
+# Check if supergfxd is enabled in config
+if [[ $(sudo jq -r '.features.hybridGPU // false' "$STATE_FILE") != "true" ]]; then
+    if gum confirm "Hybrid GPU support is not enabled. Enable it now? (Requires sys-update)"; then
+        sudo jq ".features.hybridGPU = true" "$STATE_FILE" > /tmp/state.json && sudo mv /tmp/state.json "$STATE_FILE"
+        echo "Hybrid GPU support enabled in configuration. Applying changes..."
+        sudo sys-update
+        echo "Please run this command again after the update."
+        exit 0
+    fi
+    exit 1
+fi
 
 if ! command -v supergfxctl &> /dev/null; then
-    sudo mkdir -p "/etc/nixos/nomarchy-features"
-    cat <<EOF | sudo tee "$FEATURE_FILE" > /dev/null
-{ config, pkgs, ... }:
-{
-  services.supergfxd.enable = true;
-}
-EOF
-    echo "Created $FEATURE_FILE to enable supergfxd."
-    echo "IMPORTANT: To finish enabling hybrid GPU support, add './nomarchy-features/supergfxd.nix' to your imports list in /etc/nixos/system.nix or /etc/nixos/flake.nix,"
-    echo "then run 'sys-update'."
-    exit 0
+    echo "supergfxctl not found. Is the system updated?"
+    exit 1
 fi
 
 gpu_mode=$(supergfxctl -g)