[agent_bin] binary to read and answer questions for mcts tree

[theskcd]

I want to create a new binary which takes as input the mcts json path and a question and tries to answer the question based on the content of the mcts json.
The mcts json can be deserialized into a search tree minimal or something struct and then we can get the action nodes, look at the tool input and tool output and create a trajectory for what the agent did.
Once we have that we can pass it to a llm to run inference on it and answer any user question, I think this should all be part of the tool_use_agent.rs and the binary should talk to it via the session (so uses the same flow) there is a bit of unknown here so I would like to see your approach to it.
use cargo check to make sure the code works

[theskcd]

ACK, on it!

[theskcd]

I've pushed a new commit (36438a0) to this PR. Please review the changes.