Python: [BREAKING] changed AIFunction to FunctionTool and @ai_function to @tool (#3413)

* changed AIFunction to FunctionTool and @ai_function to @tool

* test and mypy fixes

* mypy fix

* switch function tool to always_require

* fix noop

* fix github copilot imports

* test fixes

* fix ollama test

* fixes for tests

* fix tests

* reverted change to always_require and extended timeout

* fix test

python/packages/ollama/tests/test_ollama_chat_client.py

@@ -11,8 +11,8 @@ from agent_framework import (
     ChatResponseUpdate,
     Content,
     HostedWebSearchTool,
-    ai_function,
     chat_middleware,
+    tool,
 )
 from agent_framework.exceptions import (
     ServiceInitializationError,
@@ -109,7 +109,7 @@ def mock_chat_completion_tool_call() -> OllamaChatResponse:
     )
 
 
-@ai_function
+@tool(approval_mode="never_require")
 def hello_world(arg1: str) -> str:
     return "Hello World"