add support for pause/resume/replay

[bsorrentino]

Implements pause / (eventually update state) / resume / replay of workflow

take a look

• How to view and update past graph state
• Breakpoints
• [Checkpointer State](https://langchain-ai.github.io/langgraphjs/concepts/low_level/#checkpointer-state

[hide212131]

Thank you for developing such a wonderful library; I really appreciate it and support your work. I have a question about trying to implement Human-In-the-Loop. How should I use the RunnableConfig returned by CompiledGraph#updateState? In the original LangGraph, according to this, it seems there is no return value from update_state and it is updated via nextNode("step_3").

[bsorrentino]

Thank you for developing such a wonderful library; I really appreciate it and support your work. I have a question about trying to implement Human-In-the-Loop. How should I use the RunnableConfig returned by CompiledGraph#updateState? In the original LangGraph, according to this, it seems there is no return value from update_state and it is updated via nextNode("step_3").

Hi @hide212131, I'm working on documentation to clarify your question. However a quick answer is that the CompiledGrah.updateState() return a RunnableConfig that you should provide to next CompiledGraph run

[bsorrentino]

Hi @hide212131 the documentation is available here

It works on last 1.0-beta4

[hide212131]

@bsorrentino Thank you for the documentation. It will be a great reference for future development! I have a few more things I'd like to clarify, so I've raised an issue here.
#25