`exclude_disabled` modifier

[Empty2k12]

There should be a exclude_disabled modifier when querying for both docked and dock-less vehicle that filters out disabled vehicles, so they don't consume any client bandwidth when not being shown.

Possibly, the inverse (include_disabled with default exclusion would be better), or there might be the option to specify which modifier to include, maybe modelling them as an enum and the being able to do

vehicles(include: [RESERVED, AVAILABLE]) {
    vehicleId
}