Add crate-level rustdoc to crates/core/src/lib.rs so docs.rs has a useful entrypoint for the internal model and trait surface.
Acceptance criteria:
- Add a
//! module doc at the top of crates/core/src/lib.rs
- Summarize the role of
core in the crate graph
- Call out the key public types and provider traits
cargo doc --workspace --no-deps stays green
Add crate-level rustdoc to
crates/core/src/lib.rsso docs.rs has a useful entrypoint for the internal model and trait surface.Acceptance criteria:
//!module doc at the top ofcrates/core/src/lib.rscorein the crate graphcargo doc --workspace --no-depsstays green