Added grayscale

shell/toggle_grayscale.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+HOUR=$(date +%H)
+if [ "$HOUR" -ge 19 ] || [ "$HOUR" -lt 7 ]; then
+  hyprshade on grayscale-custom
+else
+  hyprshade off grayscale-custom
+fi