i3: add scripts for display management

i3/i3/scripts/display-layoutpicker

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+xrandr | grep -q "HDMI-1 connected"
+
+if [ "$?" -eq "0" ]; then
+    echo "Two screens available"
+    ~/.screenlayout/twoscreens.sh
+else
+    echo "Only one screen available"
+    ~/.screenlayout/onescreen.sh
+fi