Support for pgvector

https://github.com/pgvector/pgvector is the defacto standard vector extension for postgres - would love to see it supported.

Also development for https://github.com/tensorchord/pgvecto.rs has stopped.

And I require support for linux, mac and windows.

I found this related [issue](https://github.com/theseus-rs/postgresql-embedded/issues/47)