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/declarative/agent_framework_declarative/_loader.py

@@ -6,7 +6,6 @@ from typing import Any, Literal, TypedDict, cast
 
 import yaml
 from agent_framework import (
-    AIFunction,
     ChatAgent,
     ChatClientProtocol,
     Content,
@@ -17,6 +16,9 @@ from agent_framework import (
     HostedWebSearchTool,
     ToolProtocol,
 )
+from agent_framework import (
+    FunctionTool as AFFunctionTool,
+)
 from agent_framework._tools import _create_model_from_json_schema  # type: ignore
 from agent_framework.exceptions import AgentFrameworkException
 from dotenv import load_dotenv
@@ -719,7 +721,7 @@ class AgentFactory:
                     for binding in tool_resource.bindings:
                         if binding.name and (func := self.bindings.get(binding.name)):
                             break
-                return AIFunction(  # type: ignore
+                return AFFunctionTool(  # type: ignore
                     name=tool_resource.name,  # type: ignore
                     description=tool_resource.description,  # type: ignore
                     input_model=tool_resource.parameters.to_json_schema() if tool_resource.parameters else None,