Edict: home renovation

Add a "Home Depot" like service building for the settlement, that is only enabled when the Home Renovation edict is enabled. When it is, it must be supplied by construction parts, which the population will use to renovated the interiors of their homes. Will result in extra trash and recyclables. The edict would probably provide some unity, instead of costing unity.
The idea is to provide a way to keep up consumption of construction parts in the late game, when that part of one's factory would otherwise sit idle.