Add blob_wallpaper script to apply custom backgrounds

scripts/blob_wallpaper.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+if [ -z "$1" ]; then
+    echo "Usage: blob_wallpaper <path-to-image>"
+    exit 1
+fi
+
+IMAGE_PATH=$(realpath "$1")
+
+if [ ! -f "$IMAGE_PATH" ]; then
+    echo "Error: File '$IMAGE_PATH' does not exist."
+    exit 1
+fi
+
+# Point the Omarchy background link to your custom image
+ln -nsf "$IMAGE_PATH" "$HOME/.config/omarchy/current/background"
+
+# Relaunch swaybg smoothly
+pkill -x swaybg
+setsid uwsm-app -- swaybg -i "$HOME/.config/omarchy/current/background" -m fill >/dev/null 2>&1 &
+
+echo "Wallpaper updated to: $IMAGE_PATH"