Adding gradient.ai LLM and Embeddings

[michaelfeil]

Feature request

I propose to add the gradient-ts/js client of gradient.ai as a LLM and Embedding, similar to the Python implementation in https://python.langchain.com/docs/integrations/providers/gradient .

Motivation

Gradient.ai offers fine-tuning and inference of models without paying for the server costs.

I fine-tuned a model with a specific RAG template based on llama2 on gradient.ai, now i want to use it from Langchain, also in ts/js.

[chasemcdo]

Our team has just submitted a PR to add the LLM integration for Gradient AI inference :)

[chasemcdo]

Last couple PRs were made this morning which should wrap up this issue.

ie adapter and embedding support