v3.0.1

Fixes

• re-expose simdeez::engines as a public module again

Why

This patch restores a downstream extension point that regressed in 3.0.0, where users could no longer name concrete engine types like Avx2/Sse2 from outside the crate.

Included

• bump crate version to 3.0.1
• change engines back to a public module

Validation

• cargo test --quiet