fix: rename llama_stack_api dir

the directory structure was src/llama-stack-api/llama_stack_api

instead it should just be src/llama_stack_api to match the other packages.

update the structure and pyproject/linting config

Signed-off-by: Charlie Doern <cdoern@redhat.com>

src/llama_stack/core/client.py

@@ -12,10 +12,11 @@ from enum import Enum
 from typing import Any, Union, get_args, get_origin
 
 import httpx
-from llama_stack_api import RemoteProviderConfig
 from pydantic import BaseModel, parse_obj_as
 from termcolor import cprint
 
+from llama_stack_api import RemoteProviderConfig
+
 _CLIENT_CLASSES = {}