feat(system): comprehensive branding, styling, and system feature update

- Relocate themes to assets/themes/ and update all references.
- Implement custom SDDM theme and Plymouth theme enhancements.
- Add themed templates for Alacritty, Hyprland, Waybar, and other apps.
- Introduce Makima key remapper module and configuration.
- Add Voxtype and Walker configurations.
- Implement systemd power management and timeout optimizations.
- Add Nautilus-python extensions for LocalSend.
- Update branding assets and ASCII art integration.

bin/system/nomarchy-pkg-add

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+PKG_NAME="$1"
+
+if [ -z "$PKG_NAME" ]; then
+    echo "Usage: nnomarchy-pkg-add <package-name>"
+    exit 1
+fi
+
+STATE_FILE="$HOME/.config/home-manager/user-packages.json"
+mkdir -p "$(dirname "$STATE_FILE")"
+
+if [ ! -f "$STATE_FILE" ]; then
+    echo "[]" > "$STATE_FILE"
+fi
+
+if jq -e ". | index(\"$PKG_NAME\")" "$STATE_FILE" >/dev/null; then
+    echo "Package $PKG_NAME is already in your user-packages.json"
+    exit 0
+fi
+
+# Append package to the JSON array
+jq ". + [\"$PKG_NAME\"]" "$STATE_FILE" > "${STATE_FILE}.tmp" && mv "${STATE_FILE}.tmp" "$STATE_FILE"
+
+echo "Package $PKG_NAME added declaratively to $STATE_FILE."
+echo "Applying changes with env-update..."
+env-update