Set brightness in a more broadly compatible way

Fixes brightness setting on the Asus G14

bin/omarchy-cmd-brightness

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# Adjust brightness on the most likely display device.
+
+step="${1:-+5%}"
+
+# Start with the first possible output, then refine to the most likely given an order heuristic.
+device="$(ls -1 /sys/class/backlight 2>/dev/null | head -n1)"
+for candidate in amdgpu_bl* intel_backlight acpi_video*; do
+  if [[ -e "/sys/class/backlight/$candidate" ]]; then
+    device="$candidate"
+    break
+  fi
+done
+
+# Set the actual brightness of the display device.
+brightnessctl -d "$device" set "$step" >/dev/null
+
+# Use SwayOSD to display the new brightness setting.
+current=$(brightnessctl -d "$device" g)
+max=$(brightnessctl -d "$device" m)
+percent=$(( current * 100 / max ))
+progress=$(awk -v c="$current" -v m="$max" 'BEGIN{printf "%.2f", c/m}')
+
+swayosd-client \
+  --monitor "$(hyprctl monitors -j | jq -r '.[]|select(.focused==true).name')" \
+  --custom-icon display-brightness \
+  --custom-progress "$progress" \
+  --custom-progress-text "${percent}%"