Fix precommit check after moving to ruff (#927)

Lint check in main branch is failing. This fixes the lint check after we
moved to ruff in https://github.com/meta-llama/llama-stack/pull/921. We
need to move to a `ruff.toml` file as well as fixing and ignoring some
additional checks.

Signed-off-by: Yuan Tang <terrytangyuan@gmail.com>

llama_stack/providers/inline/inference/sentence_transformers/config.py

@@ -10,7 +10,6 @@ from pydantic import BaseModel
 
 
 class SentenceTransformersInferenceConfig(BaseModel):
-
     @classmethod
     def sample_run_config(cls) -> Dict[str, Any]:
         return {}