pub(crate) const USAGE: &str = "usage:
cargo xtask web [--bin <name>] [--package <name>] [--release] [--public-url <path>] [--features <list>]
[--manifest-path <Cargo.toml>] [--out-dir <dir>]
with --manifest-path, --release needs that workspace to declare [profile.wasm-release]
(copy it from loam's root Cargo.toml)
cargo xtask serve [--port <port>]";