Allow editing Factoriopedia visibility at runtime

[BenTechy66]

I'm working on a Pull Request to add Factoriopedia support to Ultracube. In Ultracube, some of the technology tree is hidden until you reach specific goals. Due to this, it's necessary to update the visibility of things in Factoriopedia at runtime, when new technologies are unlocked, in order to avoid spoiling the player. However, I can't find any documented way to do so.

[PennyJim]

+1 The discovery tree mod is very fun for when an overhaul can be initially very overwhelming

Being able to make a sister mod (or just bringing it into discovery tree) that works for factoriopedia would be super nice