runtime access to ItemPrototype.send_to_orbit_mode

[SWeini]

I'd like to have access to this property in runtime stage:
https://lua-api.factorio.com/latest/pro ... orbit_mode

this is not the same as having non-empty rocket_launch_products (in py mods there is a byproduct you can only automatically get rid by launching it to space in the non-space-age rocket silos)

not super critical, but it will allow factory planner (and other mods of that kind) to add pseudo recipes for this without adding them for everything

[Rseding91]

Added for the next release.