ag-ui-langgraph is coupled to copilotkit, shouldn't it be done as a generic protocol?

https://github.com/ag-ui-protocol/ag-ui/blob/main/integrations/langgraph/python/ag_ui_langgraph/agent.py#L492-L495
```python
return {
**state,
"messages": new_messages,
"tools": unique_tools,
"ag-ui": {
"tools": unique_tools,
"context": input.context or []
},
"copilotkit": {
**state.get("copilotkit", {}),
"actions": unique_tools,
},
}
```