improve structure; move stuff to relevant folders

scripts/legacy-x11/add-144hz-mode-xorg.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+# Script to add 144Hz mode to i3
+
+echo "Adding 144Hz mode to i3..."
+
+DISPLAY="DisplayPort-0"
+MODE="2560x1440_144.00_rb2"
+
+xrandr --newmode $MODE 586.59 2560 2568 2600 2640 1440 1529 1537 1543 +hsync -vsync
+xrandr --addmode $DISPLAY $MODE
+xrandr --output $DISPLAY --mode $MODE
+
+echo "144Hz mode should now be active. Check with: xrandr"