make NPCs have emergent behavior

[hellochar]

Some ideas:

• interplay of their needs for survival with the surrounding ecosystem (attain resources; build structures; grow families)
• imperfect information from #14 could serve as a cool basis for different behaviors
• "learning" and "habit forming" and understanding "abstracting principles" and have them act based on that behavior
• give them emotions that help dictate behavior
• give them interpersonal relationships and social signalling behaviors (inspiration from the sims, rimworld, and dwarf fortress could be good here)