Space factory productivity research

Adds two infinite technologies: Orbital Manufacturing Productivity and Microgravity Alloying Quality(WIP).

With intra platform transportation added in 2.1 making space factories possible. This mods adds productivity research for everything in orbit to make the prospect sweeter.

Cost and bonuses customisable in settings.

I am playing on K2SO, so most bugs should be fixed there. If you find something not working please let me know on github.