add swww and pywal

waybar/modules/switch-wallpaper.sh

@@ -0,0 +1,10 @@
+# -n tells `wal` to skip setting the wallpaper.
+wal -i ~/Wallpapers/ -n
+
+# Using feh to tile the wallpaper now.
+# We grab the wallpaper location from wal's cache so 
+# that this works even when a directory is passed.
+swww img "$(< "${HOME}/.cache/wal/wal")" --transition-type wipe --transition-angle 45
+
+notify-send "Changing Wallpaper"
+