Python: Web search file search tools (#395)

* Add web and file search tools

* add tests

* PR comments

* Add tools support for chat and assistants clients

* fix code checks

* add tests for assistants client

* Add samples

* fix fn descriptions

* Add openai responses model id to environment variables

---------

Co-authored-by: Dmytro Struk <13853051+dmytrostruk@users.noreply.github.com>

python/samples/getting_started/agents/openai_chat_client/openai_chat_client_with_web_search.py

@@ -0,0 +1,39 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+import asyncio
+from agent_framework import HostedWebSearchTool
+from agent_framework.openai import OpenAIChatClient
+
+async def main() -> None:
+    client = OpenAIChatClient(ai_model_id="gpt-4o-search-preview")
+
+    message = "What is the current weather? Do not ask for my current location."
+    # Test that the client will use the web search tool with location
+    additional_properties = {
+        "user_location": {
+            "country": "US",
+            "city": "Seattle",
+        }
+    }
+    stream = False
+    print(f"User: {message}")
+    if stream:
+        print("Assistant: ", end="")
+        async for chunk in client.get_streaming_response(
+            message,
+            tools=[HostedWebSearchTool(additional_properties=additional_properties)],
+            tool_choice="auto",
+        ):
+            if chunk.text:
+                print(chunk.text, end="")
+        print("")
+    else:
+        response = await client.get_response(
+            message,
+            tools=[HostedWebSearchTool(additional_properties=additional_properties)],
+            tool_choice="auto",
+        )
+        print(f"Assistant: {response}")
+
+if __name__ == "__main__":
+    asyncio.run(main())