Adjust waybar startup

- Create a launch script for waybar
- Use waybar launch script in autostart array
- Add a sleep between killing existing waybars
  launching new instance so it hopefully works
  reboot
- Adjust justfile to use launch script

waybar/launch.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+killall waybar
+
+sleep 5
+
+/usr/bin/waybar \
+    -c $HOME/.config/dwl/waybar/config.jsonc \
+    -s $HOME/.config/dwl/waybar/style.css &