This PR adds the wiring to both the server and the client for sending and receiving individual feature flags, as well as a client side API for convenient access to these feature flags. Release Notes: - N/A
Zed Server
This crate is what we run at https://collab.zed.dev.
It contains our back-end logic for collaboration, to which we connect from the Zed client via a websocket after authenticating via https://zed.dev, which is a separate repo running on Vercel.