The chat_ellmer() function acts as a provider interface for interacting with
ellmer chat objects through tidyllm's verb interface
Value
A provider function that can be used with tidyllm::chat().
Details
This function allows you to use any ellmer chat object (e.g., from
ellmer::chat_anthropic(), ellmer::chat_openai(), etc.) as a stateless
backend for tidyllm. The ellmer object is cloned for each interaction to
maintain tidyllm's stateless approach.
