feat(plugin-rsc): expose Node.js stream APIs

[switz]

Edit: Apologies, Claude went ahead and opened this PR automatically. This code was driven with Claude.

This closes my issue #1162 and addresses the feedback from the PR in #1164

Let me know if you want me to make any changes. Sorry for the quick trigger on the PR.

The flaw here is dual loading edge and node apis on the node path – if we want to refactor it, we can drop that. You'd know better than me if that's a big deal.

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Closes #1162

The vendored react-server-dom-webpack package includes Node.js stream APIs (renderToPipeableStream, createFromNodeStream) that are faster than their Web Streams equivalents on Node.js, but they weren't exposed by @vitejs/plugin-rsc.

Approach

The server.node and client.node variants from react-server-dom-webpack are supersets of their .edge counterparts. So each new .node file re-exports everything from the existing edge-based module and adds only the Node.js-specific delta — no code duplication.

New entry points:

import { renderToPipeableStream } from '@vitejs/plugin-rsc/rsc.node'
import { createFromNodeStream } from '@vitejs/plugin-rsc/ssr.node'

Both also re-export all existing Web Streams APIs, so consumers can switch entry points without losing access to renderToReadableStream / createFromReadableStream.

Files

New (4 files):

• src/react/rsc.node.ts — low-level wrapper, re-exports ./rsc + adds renderToPipeableStream
• src/react/ssr.node.ts — low-level wrapper, re-exports ./ssr + adds createFromNodeStream
• src/rsc.node.tsx — high-level entry, re-exports ./rsc + adds wrapped renderToPipeableStream with asset manifest enrichment
• src/ssr.node.tsx — high-level entry, re-exports ./ssr + adds createFromNodeStream

Modified (2 files):

• tsdown.config.ts — added 4 new entry points
• src/types/index.ts — added PipeableStream, RenderToPipeableStreamOptions, CreateFromNodeStreamOptions

No changes to package.json (wildcard export covers new paths) or plugin.ts (vendor alias already handles .node variants).

Test plan

• pnpm build compiles successfully with new entry points
• tsc -b ./tsconfig.json passes
• E2E test exercising the Node.js stream APIs (happy to add — would appreciate guidance on preferred approach, e.g. inline fixture variant of starter-extra that swaps the SSR entry to use createFromNodeStream)