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-brightness-keyboard

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# Adjust keyboard backlight brightness using available steps.
+# Usage: nnomarchy-brightness-keyboard <up|down|cycle>
+
+direction="${1:-up}"
+
+# Find keyboard backlight device (look for *kbd_backlight* pattern in leds class).
+device=""
+for candidate in /sys/class/leds/*kbd_backlight*; do
+  if [[ -e $candidate ]]; then
+    device="$(basename "$candidate")"
+    break
+  fi
+done
+
+if [[ -z $device ]]; then
+  echo "No keyboard backlight device found" >&2
+  exit 1
+fi
+
+# Get current and max brightness to determine step size.
+max_brightness="$(brightnessctl -d "$device" max)"
+current_brightness="$(brightnessctl -d "$device" get)"
+
+# Calculate step as one unit (keyboards typically have discrete levels like 0-3).
+if [[ $direction == "cycle" ]]; then
+  new_brightness=$(( (current_brightness + 1) % (max_brightness + 1) ))
+elif [[ $direction == "up" ]]; then
+  new_brightness=$((current_brightness + 1))
+  (( new_brightness > max_brightness )) && new_brightness=$max_brightness
+else
+  new_brightness=$((current_brightness - 1))
+  (( new_brightness < 0 )) && new_brightness=0
+fi
+
+# Set the new brightness.
+brightnessctl -d "$device" set "$new_brightness" >/dev/null
+
+# Use SwayOSD to display the new brightness setting.
+percent=$((new_brightness * 100 / max_brightness))
+nnomarchy-swayosd-kbd-brightness "$percent"