fix: rename llama_stack_api dir (#4155)

# What does this PR do?

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>
Co-authored-by: Ashwin Bharambe <ashwin.bharambe@gmail.com>

src/llama-stack-api/llama_stack_api/resource.py

@@ -1,37 +0,0 @@
-# Copyright (c) Meta Platforms, Inc. and affiliates.
-# All rights reserved.
-#
-# This source code is licensed under the terms described in the LICENSE file in
-# the root directory of this source tree.
-
-
-from enum import StrEnum
-
-from pydantic import BaseModel, Field
-
-
-class ResourceType(StrEnum):
-    model = "model"
-    shield = "shield"
-    vector_store = "vector_store"
-    dataset = "dataset"
-    scoring_function = "scoring_function"
-    benchmark = "benchmark"
-    tool = "tool"
-    tool_group = "tool_group"
-    prompt = "prompt"
-
-
-class Resource(BaseModel):
-    """Base class for all Llama Stack resources"""
-
-    identifier: str = Field(description="Unique identifier for this resource in llama stack")
-
-    provider_resource_id: str | None = Field(
-        default=None,
-        description="Unique identifier for this resource in the provider",
-    )
-
-    provider_id: str = Field(description="ID of the provider that owns this resource")
-
-    type: ResourceType = Field(description="Type of resource (e.g. 'model', 'shield', 'vector_store', etc.)")