Python: Workflow Edge Groups (#393)

* Introducing edge groups

* Add conditional and partitioning edge groups; next add samples and tests

* Add unit tests

* Add samples

* Address comments 1

* Address comments 2

* Update conditional edge group to take in cases and default

* Minor updates to sample

* Collapsing Paritioning Edge group and Conditional Edge group to source edge group

* Improve sample clarity

* Name consolidation

---------

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

python/packages/main/agent_framework/workflow/__init__.py

@@ -32,6 +32,8 @@ _IMPORTS = [
     "InMemoryCheckpointStorage",
     "CheckpointStorage",
     "WorkflowCheckpoint",
+    "Case",
+    "Default",
 ]
 
 

python/packages/main/agent_framework/workflow/__init__.pyi

@@ -6,7 +6,9 @@ from agent_framework_workflow import (
     AgentExecutorResponse,
     AgentRunEvent,
     AgentRunStreamingEvent,
+    Case,
     CheckpointStorage,
+    Default,
     Executor,
     ExecutorCompletedEvent,
     ExecutorEvent,
@@ -34,7 +36,9 @@ __all__ = [
     "AgentExecutorResponse",
     "AgentRunEvent",
     "AgentRunStreamingEvent",
+    "Case",
     "CheckpointStorage",
+    "Default",
     "Executor",
     "ExecutorCompletedEvent",
     "ExecutorEvent",