Allow attaching world effects to a NetId.

[DanielWillett]

Would love to see a way to attach effects to the transform of a NetId, whether its a player, barricade, vehicle, etc.

This could be used for floating icons that apply to a player, vehicle, building, etc. Could also be used to place decals, etc on vehicles or barricades at the exact rotation.

Example:

TriggerEffectParameters p = new TriggerEffectParameters(asset)
{
   Transform = player.GetNetId()
};

p.SetRelevantPlayer(otherPlayer.channel.owner);

EffectManager.triggerEffect(p);

[SDGNelson]

My first thought was that I thought I added this already. It is supported for certain effects like blood splatters and bullet holes, but wasn't further expanded yet because it relies on the attachment parent calling EffectManager.ClearAttachments before destroy - otherwise EffectManager.attachedEffects leaks. :[