chat() is now compatible with most chat_ functions (#699).

• chat_aws_bedrock(), chat_databricks(), chat_deepseek(), chat_github(), chat_groq(), chat_ollama(), chat_openrouter(), chat_perplexity(), and chat_vllm() now support a params argument that accepts common model parameters from params().
• The deployment_id argument in chat_azure_openai() was deprecated and replaced with model to better align with other providers.

chat_openai() now correctly maps max_tokens and top_k from params() to the OpenAI API parameters (#699).