Auto-refresh + callbacks on MCP list_changed notifications (default on) and refresh APIs

[inverted-capital]

Description

Auto-refetch tools/resources/prompts and update useMcp outputs when notifications/*/list_changed arrive. Make this configurable and callback-enabled. Default behavior: enabled.

API

useMcp({
  autoRefresh: true | {
    tools?: boolean
    resources?: boolean
    prompts?: boolean
  },
  onNotifications?:
    ((n: Notification) => void) | {
      onToolsNotification?: (n: Notification) => void
      onResourcesNotification?: (n: Notification) => void
      onPromptsNotification?: (n: Notification) => void
    }
})

Hook return additions:

{
  refreshAll(): Promise<void>
  refreshTools(): Promise<void>
  refreshResources(): Promise<void>
  refreshPrompts(): Promise<void>
}

Acceptance Criteria

• Auto-refetch on tools/resources/prompts list_changed and update outputs
• autoRefresh defaults to true, with per-type overrides
• onNotifications supports global function or per-type handlers
• New refreshAll/refreshTools/refreshResources/refreshPrompts methods exposed

Additional Context

This might solve #30, but if you are not partial to changing the hook function signature, perhaps you would consider just making auto refresh be the default ? I cannot think why you would not want auto refresh to be one, since the tool calls and resource requests you make after they have changed might be invalid.