Also:
* Add aioclient
The old client is synchronous and blocking, and the only way to achieve
true asynchronous IO is to create a new client that interfaces with
asyncio.
* Finish Nix Flake description and make the GUI available for `nix run`
Follow ARTIQ, and in this project lets us include the version number
directly in flake.nix instead of linking to the toml file of a specific
release date, as we use stable Rust.
Also, from nixpkgs manual:
both oxalica's overlay and fenix better integrate with nix and cache
optimizations. Because of this and ergonomics, either of those
community projects should be preferred to the Mozilla's Rust overlay
(nixpkgs-mozilla).
