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-system-shutdown

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# Shutdown command that first closes all application windows (thus giving them a chance to save state).
+# This is particularly helpful for applications like Chromium that otherwise won't shutdown cleanly.
+
+nnomarchy-state clear re*-required
+
+# Schedule the shutdown to happen after closing windows (detached from terminal)
+nohup bash -c "sleep 2 && systemctl poweroff --no-wall" >/dev/null 2>&1 &
+
+# Now close all windows
+nnomarchy-hyprland-window-close-all
+sleep 1 # Allow apps like Chrome to shutdown correctly