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/hardware/nomarchy-battery-present

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# Returns true if a battery is present on the system.
+# Used by the battery monitor and other battery-related checks.
+
+for bat in /sys/class/power_supply/BAT*; do
+  [[ -r $bat/present ]] &&
+  [[ $(cat $bat/present) == "1" ]] &&
+  [[ $(cat $bat/type) == "Battery" ]] &&
+  exit 0
+done
+
+exit 1