llm.get_models() and .get_async_models() documented functions

[simonw]

For the Python API. Currently you have to mess around with this function instead:

llm/llm/__init__.py

Line 70 in a6d62b7

def get_models_with_aliases() -> List["ModelWithAliases"]:

[simonw]

llm/llm/__init__.py

Lines 170 to 177 in c52cfee

	def get_models() -> List[Model]:
	"Get all registered models"
	return [model for model in get_model_aliases().values()]
	def get_async_models() -> List[AsyncModel]:
	"Get all registered async models"
	return [model for model in get_async_model_aliases().values()]

Documented here: https://github.com/simonw/llm/blob/c52cfee881d2150643bd3fa80cd82a3f81b76b59/docs/python-api.md#listing-models