Adding groq provider

[sanadalhelo]

Description

Add a groq language model provider using groq’s OpenAI-compatible chat completions API.

Motivation

Enable using Groq hosted models via LangExtract without custom adapters.

Scope

• New provider only
• No breaking changes

[jainaviral898]

Just changing the base_url in OpenAI provider will get groq working.

model = OpenAILanguageModel( model_id="meta-llama/llama-4-scout-17b-16e-instruct", api_key=api_key, base_url="https://api.groq.com/openai/v1", temperature=0.1, )