Vincent Min

### 💬 Let us know how we can improve our documentation. Why does the `copilotRuntimeNextJSAppRouterEndpoint` need a serviceAdapter? I'm surprised to see that [the research-canvas example](https://github.com/CopilotKit/CopilotKit/blob/main/examples/coagents-research-canvas/ui/src/app/api/copilotkit/route.ts) provides an `OpenAIAdapter` instance...