chore: move all Llama Stack types from llama-models to llama-stack (#1098)

llama-models should have extremely minimal cruft. Its sole purpose
should be didactic -- show the simplest implementation of the llama
models and document the prompt formats, etc.

This PR is the complement to
https://github.com/meta-llama/llama-models/pull/279

## Test Plan

Ensure all `llama` CLI `model` sub-commands work:

```bash
llama model list
llama model download --model-id ...
llama model prompt-format -m ...
```

Ran tests:
```bash
cd tests/client-sdk
LLAMA_STACK_CONFIG=fireworks pytest -s -v inference/
LLAMA_STACK_CONFIG=fireworks pytest -s -v vector_io/
LLAMA_STACK_CONFIG=fireworks pytest -s -v agents/
```

Create a fresh venv `uv venv && source .venv/bin/activate` and run
`llama stack build --template fireworks --image-type venv` followed by
`llama stack run together --image-type venv` <-- the server runs

Also checked that the OpenAPI generator can run and there is no change
in the generated files as a result.

```bash
cd docs/openapi_generator
sh run_openapi_generator.sh
```

docs/openapi_generator/generate.py

@@ -16,18 +16,6 @@ from pathlib import Path
 import fire
 import ruamel.yaml as yaml
 
-from llama_models import schema_utils
-
-# We do some monkey-patching to ensure our definitions only use the minimal
-# (json_schema_type, webmethod) definitions from the llama_models package. For
-# generation though, we need the full definitions and implementations from the
-#  (json-strong-typing) package.
-
-from .strong_typing.schema import json_schema_type, register_schema
-
-schema_utils.json_schema_type = json_schema_type
-schema_utils.register_schema = register_schema
-
 from llama_stack.apis.version import LLAMA_STACK_API_VERSION  # noqa: E402
 from llama_stack.distribution.stack import LlamaStack  # noqa: E402
 

docs/openapi_generator/pyopenapi/generator.py

@@ -10,9 +10,9 @@ import typing
 from dataclasses import make_dataclass
 from typing import Any, Dict, Set, Union
 
-from ..strong_typing.core import JsonType
-from ..strong_typing.docstring import Docstring, parse_type
-from ..strong_typing.inspection import (
+from llama_stack.strong_typing.core import JsonType
+from llama_stack.strong_typing.docstring import Docstring, parse_type
+from llama_stack.strong_typing.inspection import (
     is_generic_list,
     is_type_optional,
     is_type_union,
@@ -20,15 +20,15 @@ from ..strong_typing.inspection import (
     unwrap_optional_type,
     unwrap_union_types,
 )
-from ..strong_typing.name import python_type_to_name
-from ..strong_typing.schema import (
+from llama_stack.strong_typing.name import python_type_to_name
+from llama_stack.strong_typing.schema import (
     get_schema_identifier,
     JsonSchemaGenerator,
     register_schema,
     Schema,
     SchemaOptions,
 )
-from ..strong_typing.serialization import json_dump_string, object_to_json
+from llama_stack.strong_typing.serialization import json_dump_string, object_to_json
 
 from .operations import (
     EndpointOperation,

docs/openapi_generator/pyopenapi/operations.py

@@ -15,7 +15,7 @@ from llama_stack.apis.version import LLAMA_STACK_API_VERSION
 
 from termcolor import colored
 
-from ..strong_typing.inspection import get_signature
+from llama_stack.strong_typing.inspection import get_signature
 
 
 def split_prefix(

docs/openapi_generator/pyopenapi/specification.py

@@ -9,7 +9,7 @@ import enum
 from dataclasses import dataclass
 from typing import Any, ClassVar, Dict, List, Optional, Union
 
-from ..strong_typing.schema import JsonType, Schema, StrictJsonType
+from llama_stack.strong_typing.schema import JsonType, Schema, StrictJsonType
 
 URL = str
 

docs/openapi_generator/pyopenapi/utility.py

@@ -9,7 +9,7 @@ import typing
 from pathlib import Path
 from typing import TextIO
 
-from ..strong_typing.schema import object_to_json, StrictJsonType
+from llama_stack.strong_typing.schema import object_to_json, StrictJsonType
 
 from .generator import Generator
 from .options import Options