Easily Sync Character Data

Let's make it easier to jam on Character data.

## Problem:

You have to run `init` (often through `npm run dev`) for the world to add new characters. Once they're there, you can't re-sync the json.

## Solutions:

- Edit the data directly in the dashboard, under `agentDescriptions`. This will not update in the UI (see playerDescriptions for that) but will be used for prompts.
- Let's add a function to re-sync the data from the init script with the active agents. You can run it when you edit.
- Or have a way to export the data from the dashboard into a json file so you can capture changes