Replace the foldable bicycle special item with a generic folding vehicle

[int-ua]

Is your feature request related to a problem? Please describe.

Folding vehicles are now possible to create in the standard vehicle interface, no need to have this separate item that has accumulated two major issues: #28976 and #39399

@BevapDin comment:

The whole folding bicycle item should go away. It is either inconsistent or redundant:

It's inconsistent because it creates (when unfolded) a vehicle that could have been made via the vehicle interface (frames, saddle, wheels, etc.) However, making the item requires different tools / tool charges and different time than making the vehicle.

Fixing that inconsistency (which may get unfixed as soon as somebody changes the vehicle part installation settings), would make the item redundant. One can instead just make a vehicle and fold that. Why make an item, if it takes the same resources?

Therefor it should be removed.

Note that vehicles creates via the vehicle interface can be made with special properties (someone might want a bicycle with a horn, different cargo part, different wheels ...)

Describe the solution you'd like

Folding bicycle replaced with similar vehicle, not special item.

Describe alternatives you've considered

Additional context

[stale]

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