feat: add custom startdwm script to allow restarts

Modified script from the Archwiki which runs DWM in a loop so that we
can restart the window manager we make changes to the binary.

config/X11/xinitrc

@@ -17,4 +17,4 @@ logrotate \
     ${XDG_CONFIG_HOME}/logrotate/logrotate.conf \
     &
 
-exec dwm
+exec startdwm

scripts/startdwm

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+logfile="${LOG_HOME}/dwm.log"
+
+while true; do
+    # Log stderror to a file
+    dwm 2> "$logfile"
+done