Python: Add tau2 benchmark integration with comprehensive testing and documentation (#817)

* first commit to tau2-bench

* tau2-bench agent

* tau2 agent

* add condition

* checkpoint

* bug fix

* add tests

* fix tests

* add comments

* add comments

* minor fix

* fix

* batch test script

* .

* init.bak -> init.py

* fix mypy

* update readme

* fix env

* remove temp files

* setup tests

* fix gaia tasks

* fix tau2 tests

* fix coverage

* fix default version

* update cookiecutter template

---------

Co-authored-by: Eric Zhu <ekzhu@users.noreply.github.com>

python/packages/lab/cookiecutter-agent-framework-lab/{{cookiecutter.package_name}}/src/agent_framework/__init__.py

@@ -0,0 +1,4 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+# This makes agent_framework a namespace package
+__path__ = __import__("pkgutil").extend_path(__path__, __name__)

python/packages/lab/cookiecutter-agent-framework-lab/{{cookiecutter.package_name}}/src/agent_framework/lab/__init__.py

@@ -0,0 +1,4 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+# This makes agent_framework.lab a namespace package
+__path__ = __import__("pkgutil").extend_path(__path__, __name__)

python/packages/lab/cookiecutter-agent-framework-lab/{{cookiecutter.package_name}}/src/agent_framework/lab/{{cookiecutter.package_name}}/__init__.py

@@ -0,0 +1,4 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+# Import and re-export from the actual implementation
+from agent_framework_lab_{{cookiecutter.package_name}} import *  # noqa: F403, F401

python/packages/lab/cookiecutter-agent-framework-lab/{{cookiecutter.package_name}}/src/agent_framework_lab_{{cookiecutter.package_name}}/__init__.py

@@ -0,0 +1,21 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+"""
+{{ cookiecutter.package_description }}
+"""
+
+import importlib.metadata
+
+# Import your main exports here
+# from .main_module import MainClass, main_function
+
+try:
+    __version__ = importlib.metadata.version(__name__)
+except importlib.metadata.PackageNotFoundError:
+    __version__ = "0.0.0"  # Fallback for development mode
+
+__all__ = [
+    # List your exports here
+    # "MainClass",
+    # "main_function",
+]