[remove import *][2/n] remove rest of import * in implementations (#690)

# What does this PR do?

- see https://github.com/meta-llama/llama-stack/pull/689
<img width="591" alt="image"
src="https://github.com/user-attachments/assets/76946a67-7373-43b5-8a03-0ad201aa543b"
/>

- leaving `tools/builtin.py` to avoid conflicts


## Test Plan

- see https://github.com/meta-llama/llama-stack/pull/689

## Sources

Please link relevant resources if necessary.


## Before submitting

- [ ] This PR fixes a typo or improves the docs (you can dismiss the
other checks if that's the case).
- [ ] Ran pre-commit to handle lint / formatting issues.
- [ ] Read the [contributor
guideline](https://github.com/meta-llama/llama-stack/blob/main/CONTRIBUTING.md),
      Pull Request section?
- [ ] Updated relevant documentation.
- [ ] Wrote necessary unit or integration tests.

llama_stack/providers/inline/agents/meta_reference/agents.py

@@ -9,15 +9,26 @@ import logging
 import shutil
 import tempfile
 import uuid
-from typing import AsyncGenerator
+from typing import AsyncGenerator, List, Optional, Union
 
 from termcolor import colored
 
-from llama_stack.apis.inference import Inference
+from llama_stack.apis.agents import (
+    AgentConfig,
+    AgentCreateResponse,
+    Agents,
+    AgentSessionCreateResponse,
+    AgentStepResponse,
+    AgentTurnCreateRequest,
+    Attachment,
+    Session,
+    Turn,
+)
+
+from llama_stack.apis.inference import Inference, ToolResponseMessage, UserMessage
 from llama_stack.apis.memory import Memory
 from llama_stack.apis.memory_banks import MemoryBanks
 from llama_stack.apis.safety import Safety
-from llama_stack.apis.agents import *  # noqa: F403
 
 from llama_stack.providers.utils.kvstore import InmemoryKVStoreImpl, kvstore_impl