reliakit-core vs clock-lib vs qubit-clock

Shared building blocks for Reliakit: a clock-agnostic Clock trait with manual and monotonic clocks. no_std and zero-dependency.

Monotonic and wall-clock time readings for Rust, with a mockable clock for deterministic testing. Simple Tier-1 API, zero dependencies, no unsafe.

Thread-safe clock abstractions for Rust: monotonic clocks, mock testing, high-precision time meters, and timezone support