You did not do any damage as the transmission was not under load if you were stopping. I have driven a few cars where the transmission shift fork had broken and the clutch did not even work. Shifted them without a clutch with no damage to the transmission whatsoever. Not advising anyone to try this as it takes practice but it can be done. Don't worry and rest easy.

Doing it occasionally won't harm the car but don't make a habit of it.

The two Yanks who say you don't need to use the clutch to select neutral are wrong, as Americans usually are when it comes to manual transmissions.

No, you don't need to depress the clutch when shifting into neutral.

No problem at all!

Shifting OUT of any gear (into neutral) never requires a clutch.

Not at all. The engine and trans are close to the same speed at times and it is easy to do this. When the clutch goes out you can drive this way in a pinch. Not recommended though.

you shifted to neutral so no harm . its no different from shifting from d to n on an automatic

I was coming to a stop at a set of traffic lights so I think I released the clutch early then shifted from 4th gear to neutral which meant I didn't press the clutch while shifting + braking. When I had shifted from 4th to neutral there was no noise but I am worried if I damaged the gearbox/transmission/clutch or car parts