Python: added ChatClientBase with function calling (#147)

* added ChatClientBase with function calling

* streaming update

* fixed typing

* test setup

* small update

* src setup

* removed src, updated test naming

* fixed test command

* alolow args

* updated test run

* added unit test folder to azure

* added init and unit test to azure

* added other cross tests

* restructured

* reset test run

* fix name

* removed always

* updated test

* extend pytest.xml locations

* run surface always

* added decorators for FC and marked tests

* fixed mypy settings and added tests

* fix override import

* removed import

python/packages/main/agent_framework/guard_rails.py

@@ -0,0 +1,25 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+
+from typing import Generic, Protocol, TypeVar, runtime_checkable
+
+TInput = TypeVar("TInput")
+TResponse = TypeVar("TResponse")
+
+
+@runtime_checkable
+class InputGuardrail(Protocol, Generic[TInput]):
+    """A protocol for input guardrails that can validate and transform input messages."""
+
+    def __call__(self, message: TInput) -> TInput:
+        """Validate and possibly transform the input message."""
+        ...
+
+
+@runtime_checkable
+class OutputGuardrail(Protocol, Generic[TResponse]):
+    """A protocol for output guardrails that can validate and transform output messages."""
+
+    def __call__(self, message: TResponse) -> TResponse:
+        """Validate and possibly transform the output message."""
+        ...