[FEAT] Define model for Embedding

[netandreus]

Problem

I am using LocalAI with Zep.

llm:
  service: "openai"
  model: "gpt-3.5-turbo-1106"
  openai_endpoint: "http://host.docker.internal:8080/v1"

I can define model for llm itself, but It's needed also to define model for embeddings, because It seems that now model is hardcoded to text-embedding-ada-002.

Possible solution

Add and use model key in embeddings options like this:

    embeddings:
      enabled: true
      chunk_size: 200
      dimensions: 384
      service: "openai"
      model: "some-custom-model"

[danielchalef]

We're refactoring how LLMs work and separating generation/completion from embeddings, which will address the above. We'll be releasing this in the new year.