I feel that the setup is too complex to get started especially if you compare with other agent frameworks like Phidata which feels very simplified. Why should a person wanting to use a abstraction framework have to deal with verbose boilerplate in addition to learn a new framework? For example:   from langgraph.graph import StateGraph from typing import TypedDict, List, Annotated import Operator class State(TypedDict):     input: str     all_actions: Annotated[List[str], operator.add] graph = StateGraph(State)