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/apps/nomarchy-restart-opencode

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Reload opencode configuration (used by the Nnomarchy theme switching).
+
+if pgrep -x opencode >/dev/null; then
+  killall -SIGUSR2 opencode
+fi