add: niri getting started config

configs/niri_l/scripts/swaybg-random.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env sh
+
+# Wallpaper directory
+WP_FOLDER=/home/toniizk/Pictures/Backgrounds
+
+# Find a random image file (supports png/jpg, add more extensions if needed)
+FILE=$(find "$WP_FOLDER" -type f \( -name '*.png' -o -name '*.jpg' \) | shuf -n1)
+
+# Kill any existing swaybg process
+killall swaybg
+
+# Start a new swaybg instance with the random image
+swaybg -i "$FILE" -m fill &
+