[wip] Add manager agent

[vsoch]

TODO:

• design a set of tools that allow for easy query (save, retrieve, query) of a general result. The use case is that we want to allow agents to save along the way.
• create logic in the state machine for recording the plan (already done) and the transitions and counts. We want to be able to go back and understand how a graph was traversed.
• create an optimization agent (sub-agent) that is given a task to optimize a specific metric. They are given a most recent result, instructed to use tools to look up previous results that are similar, and then asked for an explicit decision to retry or stop. If retry is requested, an updated spec must be given (and we need to have the state machine return to the step that did the run to process everything again).

For the last point, we can eventually have tool calls be to different algorithms or models that the optimization agent can use to make the decision. We can imagine then that the agent is given the task to optimize, sees the tools available, and then does queries to prepare whatever inputs are needed for the algorithns, calls, and gets the decision. I thought through different designs for this today, from a very uncontrolled "here is the entire state machine graph, what can we do better?" to this more controlled design, and I think to start the controlled design makes more sense. The reason is that we want to have the agent do what it is best at - taking different sources of information and tools to make a deicison about what to do next (which is retry/stop and a new thing to try) but we don't want to give it so much unbounded control that it goes off the rails and can try almost anything (and not be able to focus on a specific task).