Summary

• add src/error.rs and re-export the crate-wide Error/Result helpers (src/lib.rs, src/serialization.rs)
• migrate bit-vector, integer-vector, and wavelet-matrix code to return the new error type and set their Serializable::Error associated types (src/bit_vector/mod.rs, src/bit_vector/rank9sel/inner.rs, src/int_vectors/*, src/char_sequences/wavelet_matrix.rs, src/data.rs)
• drop the anyhow dependency and document the change (Cargo.toml, CHANGELOG.md, INVENTORY.md)

https://chatgpt.com/codex/tasks/task_e_68d6ce73dd6c8322819731f0e5f4617a