[x] Convert some orbitals into modules for installation on GC3-style cores
[x] Make them slightly cheaper?
[x] Come up with a safer way of executing module upgrades that won't destroy the whole station. (Particularly important for Nylli!) I have some ideas already...
[x] Decide whether modules should be built from the cores themselves, or built from planets/Motherships. This decision will also affect pricing.
[x] Add new modules as per the list in the #feedback channel on Discord.