[Firmware] Add delayed_gcode section to turn on Stealthburner LEDs on Printer Boot

[ChaosBlades]

[delayed_gcode sb_leds]
## STATUS_READY
initial_duration: 1
gcode:
    _set_sb_leds_by_name leds="logo" color="standby" transmit=0
    _set_sb_leds_by_name leds="nozzle" color="standby" transmit=1

Not sure if you would want to implement this in this way but some kind of section like this should be added at least in a commented out manner.

[nemgrea]

why is a delay beneficial? (i dont use those LEDs just looking for explanation)