integrate with milvus for vector-store

[zach030]

https://github.com/milvus-io/milvus-sdk-go

[obitech]

I would like to look into this 👋

@tmc would it make sense to create an example/ dir (or something like that) with a docker-compose.yaml and main.go showcasing this, locally?

[pattonjp]

I had started working on this for a side project before finding this issue. I have a fork here if anyone finds interesting i can create a pr after some more testing.