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/appearance/nomarchy-theme-update

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+for dir in ~/.config/nnomarchy/themes/*/; do
+  if [[ -d $dir ]] && [[ ! -L ${dir%/} ]] && [[ -d $dir/.git ]]; then
+    echo "Updating: $(basename "$dir")"
+    git -C "$dir" pull
+  fi
+done