Change WireLib.TriggerInput function signature

[Denneisk]

Change WireLib.TriggerInput function signature to WireLib.TriggerInput(ent:Entity, name:string, value:any, ext:table?) (from WireLib.TriggerInput(ent:Entity, name:string, value:any, ...)). ext is a table of extra information to be passed if needed.

Currently the function signature takes varargs but it's only used for OutputIterator objects (are these even necessary?). The varargs are clearly under-utilized, so mandating it to be a table should not cause a lot of problems and will avoid using varargs.