feat(sway): add power-aware-effects script

sway/scripts/power-aware-effects.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+# toggle swayfx blur and shadows based on battery state
+
+while true; do
+  status=$(cat /sys/class/power_supply/BAT1/status 2>/dev/null || cat /sys/class/power_supply/BAT0/status)
+
+  if [ "$status" = "Discharging" ]; then
+    swaymsg blur off
+    swaymsg shadows off
+  else
+    swaymsg blur on
+    swaymsg shadows on
+  fi
+
+  sleep 30
+done