Usecase: From Raw / Blackbox

[Martin-Pitt]

There's a playstyle where you build factory setups with only raw inputs. Another term for it is blackbox, which you can often find blueprints for: https://www.dysonsphereblueprints.com/blueprints?search=blackbox

Some tweaks need to be done to the calculator to allow for this playstyle, such as for example being able to show number of facilities per item rather than a nested view; this ties into #10.