aya/init
Tamir Duberstein a43e40ae1d introduce workspace lints, warn on unused crates
In practice this will forbid unused dependencies because we run clippy
with `--deny warnings`.

Workspace lints is a nice place to ratchet up lints through the codebase
all at once and consistently.
..
src Use #[expect(...)] rather than #[allow(...)]
Cargo.toml introduce workspace lints, warn on unused crates