Will this sdk support the equivalent of `GenerativeModel.embedContent` from `@google/generative-ai`

**Is your feature request related to a problem? Please describe.**
I want to extract embeddings using Gemini via Vertex AI

**Describe the solution you'd like**
I'd like to see a 1-1 version of `GenerativeModel.embedContent` from `@google/generative-ai` in this sdk

**Describe alternatives you've considered**
I've seen this https://cloud.google.com/vertex-ai/generative-ai/docs/embeddings/get-text-embeddings#generative-ai-get-text-embedding-nodejs so I know it's possible but wondering if it's on the roadmap to be implemented here

**Additional context**
I'm working on implementing this for an open source library that already contains embedding extraction from `@google/generative-ai`