Function RealtimePipelineProvider

RealtimePipelineProvider(props: RealtimePipelineProviderProps): ReactNode
Mount the pipeline store + connection at the React root. Children can subscribe via import("./hooks").usePipelineValue or any of the typed per-slice hooks in the same module.

The provider:
1. Lazily builds one PipelineStoreApi per provider instance (stable across re-renders via useRef).
2. Mounts a single PipelineConnection in useEffect. The connection's destroy() runs on unmount.
3. Exposes the store via React context for selector hooks.
If you supply your own store and/or connection, the provider skips the corresponding step — convenient for tests + GreenRoom scenarios where the store is driven by simulated traffic.
Parameters
- props: RealtimePipelineProviderProps
Returns ReactNode
Example
```
import { RealtimePipelineProvider, usePipelineCampaigns } from "@playlive/react-pipeline";

function App() {
  return (
    <RealtimePipelineProvider initialCampaignIDs={["abc-123"]}>
      <Overlay />
    </RealtimePipelineProvider>
  );
}

function Overlay() {
  const campaigns = usePipelineCampaigns();
  return <pre>{JSON.stringify(campaigns, null, 2)}</pre>;
}
```
- Defined in react-pipeline/src/realtime-provider.tsx:101