chore: import upstream snapshot with attribution

sdk-python/copilotkit/__init__.py

@@ -0,0 +1,57 @@
+"""CopilotKit SDK"""
+
+from .sdk import (
+    CopilotKitRemoteEndpoint,
+    CopilotKitContext,
+    CopilotKitSDK,
+    CopilotKitSDKContext,
+)
+from .action import Action
+from .exc import (
+    CopilotKitError,
+    CopilotKitMisuseError,
+    ActionNotFoundException,
+    AgentNotFoundException,
+    ActionExecutionException,
+    AgentExecutionException,
+)
+from .langgraph import CopilotKitState
+from .parameter import Parameter
+from .agent import Agent
+from .langgraph_agui_agent import LangGraphAGUIAgent
+from .copilotkit_lg_middleware import CopilotKitMiddleware
+from ag_ui_langgraph.middlewares.state_streaming import (
+    StateStreamingMiddleware,
+    StateItem,
+)
+from .header_propagation import (
+    set_forwarded_headers,
+    get_forwarded_headers,
+    install_httpx_hook,
+)
+
+
+__all__ = [
+    "CopilotKitRemoteEndpoint",
+    "CopilotKitSDK",
+    "Action",
+    "CopilotKitState",
+    "Parameter",
+    "Agent",
+    "CopilotKitContext",
+    "CopilotKitSDKContext",
+    "CopilotKitError",
+    "CopilotKitMisuseError",
+    "ActionNotFoundException",
+    "AgentNotFoundException",
+    "ActionExecutionException",
+    "AgentExecutionException",
+    "CrewAIAgent",  # pyright: ignore[reportUnsupportedDunderAll] pylint: disable=undefined-all-variable
+    "LangGraphAGUIAgent",
+    "CopilotKitMiddleware",
+    "StateStreamingMiddleware",
+    "StateItem",
+    "set_forwarded_headers",
+    "get_forwarded_headers",
+    "install_httpx_hook",
+]