docs(rsc): document /react/* entries and update examples list (#1311)

Co-authored-by: Hiroshi Ogawa <4232207+hi-ogawa@users.noreply.github.com>
Co-authored-by: OpenCode <noreply@opencode.ai>

Author: hi-ogawa

packages/plugin-rsc/README.md

@@ -27,8 +27,12 @@ npm create vite@latest -- --template rsc
 
 - [`./examples/basic`](./examples/basic) - Advanced RSC features and testing
   - This is mainly used for e2e testing and includes various advanced RSC usages (e.g. `"use cache"` example).
-- [`./examples/performance-track`](./examples/performance-track) - Minimal React Server Components performance track probe.
 - [`./examples/ssg`](./examples/ssg) - Static site generation with MDX and client components for interactivity.
+- [`./examples/ppr`](./examples/ppr) - Partial prerendering with a reusable static HTML shell and request-time RSC content.
+- [`./examples/no-ssr`](./examples/no-ssr) - RSC application without an SSR environment.
+- [`./examples/client-first`](./examples/client-first) - Experimental client-owned page that consumes RSC function results.
+- [`./examples/browser-mode`](./examples/browser-mode) - Advanced setup that runs both RSC and React client environments in the browser with custom module loading.
+- [`./examples/performance-track`](./examples/performance-track) - Minimal React Server Components performance track probe.
 - [`./examples/react-router`](./examples/react-router) - React Router RSC integration
   - Demonstrates how to integrate [experimental React Router RSC API](https://remix.run/blog/rsc-preview). React Router now provides [official RSC support](https://reactrouter.com/how-to/react-server-components), so it's recommended to follow React Router's official documentation for the latest integration.
 
@@ -525,6 +529,29 @@ This module provides Vite-integrated RSC runtime APIs based on
 - `createTemporaryReferenceSet`: Creates a temporary reference set shared by deserialization and reply serialization
 - `setServerCallback`: Configures how server functions are called
 
+### Low-level runtime entry points
+
+The runtime APIs are exposed through two layers:
+
+- `@vitejs/plugin-rsc/rsc`, `@vitejs/plugin-rsc/ssr`, and
+  `@vitejs/plugin-rsc/browser` are the recommended entry points for application
+  and framework runtime code. They initialize the plugin's built-in module
+  loading using the manifests generated by Vite and re-export the corresponding
+  React runtime APIs described above.
+- `@vitejs/plugin-rsc/react/rsc`, `@vitejs/plugin-rsc/react/ssr`, and
+  `@vitejs/plugin-rsc/react/browser` are low-level runtime adapters. They are
+  used by code generated for `"use client"` and `"use server"`, and by custom
+  integrations that provide module loading through `setRequireModule` instead
+  of using the plugin's generated manifests.
+
+The two layers share the same module loader within an environment, which allows
+generated code to use `/react/*` after a top-level entry initializes the
+built-in loader. Application code should continue using the top-level entries,
+which re-export the same runtime APIs. Direct use of `/react/*` is only needed
+by custom integrations that install their own loaders, such as the
+[`examples/browser-mode`](./examples/browser-mode) example, which runs the RSC
+and React client environments in the browser.
+
 ## Tips
 
 ### CSS Support