Towing - Add rope to vehicle inventory

[Dystopian]

When merged this pull request will:

• add setting to add rope to all Car and Tank vehicles inventory.

Cars get 6m rope; tanks, APCs and trucks get 12m rope. There is ace_cargo_hasCargo config value check to handle all those quadbike/cart/etc vehicles.

Setting needs restart only on disabling.

Not completely sure about:

• default setting value (enabled now);
• setting category (Logistics now, can be Vehicles);
• should add caching for vehicle classes (I don't think it's worth it);

At least some CUP trucks have Car_F parent instead of Truck_F so they get 6m rope but I don't think it's a big problem.

[PabstMirror]

Looks good default setting could go either way, I think true is probably fine