[Chat] Add Chat from TRL 🐈 (#35714)

* tmp commit

* add working chat

* add docts

* docs 2

* use auto dtype by default

docs/source/en/llm_tutorial.md

@@ -23,6 +23,12 @@ LLMs, or Large Language Models, are the key component behind text generation. In
 
 Autoregressive generation is the inference-time procedure of iteratively calling a model with its own generated outputs, given a few initial inputs. In 🤗 Transformers, this is handled by the [`~generation.GenerationMixin.generate`] method, which is available to all models with generative capabilities.
 
+<Tip>
+
+If you want to jump straight to chatting with a model, [try our `transformers-cli chat` CLI](quicktour#chat-with-text-generation-models).
+
+</Tip>
+
 This tutorial will show you how to:
 
 * Generate text with an LLM