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-logout

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Logout command that first closes all application windows (thus giving them a chance to save state),
+# then stops the session, returning to the SDDM login screen.
+
+# Schedule the session stop after closing windows (detached from terminal)
+nohup bash -c "sleep 2 && uwsm stop" >/dev/null 2>&1 &
+
+# Now close all windows
+nnomarchy-hyprland-window-close-all
+sleep 1 # Allow apps like Chrome to shutdown correctly