Python: consolidate lab packages into a single one; update contribution guidelines (#940)

* consolidate lab packages into a single one; update contribution guidelines

* update dep list

* add poe tasks; fix tests and lint erros

* add lab tests for CI

* fix test

* update root pyproject.toml

python/packages/lab/namespace/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/namespace/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/namespace/agent_framework/lab/gaia/__init__.py

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

python/packages/lab/namespace/agent_framework/lab/lightning/__init__.py

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

python/packages/lab/namespace/agent_framework/lab/tau2/__init__.py

@@ -0,0 +1,4 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+# Import and re-export from the actual implementation
+from agent_framework_lab_tau2 import *  # noqa: F403