Python: Fix ollama_chat_client.py sample: pass tools via options dict (#6480)

* Fix ollama_chat_client.py sample: pass tools via options dict

The sample was passing tools as a direct keyword argument to
get_response(), which caused a TypeError. The tools parameter
must be passed inside the options dict per the SupportsChatGetResponse
protocol.

Fixes #6411

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Wrap tools in a list as expected by OllamaChatClient

_prepare_tools_for_ollama iterates the tools value, so it must be a
list rather than a bare FunctionTool instance.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: giles17

python/samples/02-agents/providers/ollama/ollama_chat_client.py

@@ -40,12 +40,12 @@ async def main() -> None:
     print(f"User: {message}")
     if stream:
         print("Assistant: ", end="")
-        async for chunk in client.get_response(messages, tools=get_time, stream=True):
+        async for chunk in client.get_response(messages, options={"tools": [get_time]}, stream=True):
             if str(chunk):
                 print(str(chunk), end="")
         print("")
     else:
-        response = await client.get_response(messages, tools=get_time)
+        response = await client.get_response(messages, options={"tools": [get_time]})
         print(f"Assistant: {response}")