🤼‍♂️ netcode 2 achievement: multiplayer gameplay

[chase-moskal]

it's crude, it's rude, and it needs to be refactored — but here it is!!

test it now at https://benevolent.games/

of course, these are just our first babysteps into the multiplayer netcode. there's no smoothing, no clientside prediction, nothing fancy at all. well, it has the beginnings of aspects that are slightly fancy. it's surely riddled with bugs for now. our next step is to heavily refactor all this new netcode for a few passes, before proceeding to improve it with aspects like smoothing and whatnot.

the host is authoritative, and clients send their "walking intentions" to the host, who kindly obliges to move the player capsules around. i've crudely sketched out a great deal of the netcode core architecture.

and we can push cubes 😎