Add bindings for `ahash`

[`ahash`](https://github.com/tkaitchuck/aHash) is a non-crypto crazy fast hash algo without SSE and AVX instructions only for hash maps.

Start by locating the existing hash implementations and binding patterns in the repository; the issue names no files, entry points, or tests. Compare the needed ahash integration with those existing patterns and identify how it should be exposed. Done means the binding is available through the library and is covered by the repository's relevant tests.

Written by the indexing model from the issue text.