docs(ssr): update example projects (#14630)

Author: bluwy

docs/guide/ssr.md

@@ -16,10 +16,16 @@ If you have questions, the community is usually helpful at [Vite Discord's #ssr
 
 ## Example Projects
 
-Vite provides built-in support for server-side rendering (SSR). The Vite playground contains example SSR setups for Vue 3 and React, which can be used as references for this guide:
+Vite provides built-in support for server-side rendering (SSR). [`create-vite-extra`](https://github.com/bluwy/create-vite-extra) contains example SSR setups you can use as references for this guide:
 
-- [Vue 3](https://github.com/vitejs/vite-plugin-vue/tree/main/playground/ssr-vue)
-- [React](https://github.com/vitejs/vite-plugin-react/tree/main/playground/ssr-react)
+- [Vanilla](https://github.com/bluwy/create-vite-extra/tree/master/template-ssr-vanilla)
+- [Vue](https://github.com/bluwy/create-vite-extra/tree/master/template-ssr-vue)
+- [React](https://github.com/bluwy/create-vite-extra/tree/master/template-ssr-react)
+- [Preact](https://github.com/bluwy/create-vite-extra/tree/master/template-ssr-preact)
+- [Svelte](https://github.com/bluwy/create-vite-extra/tree/master/template-ssr-svelte)
+- [Solid](https://github.com/bluwy/create-vite-extra/tree/master/template-ssr-solid)
+
+You can also scaffold these projects locally by [running `create-vite`](./index.md#scaffolding-your-first-vite-project) and choose `Others > create-vite-extra` under the framework option.
 
 ## Source Structure
 
@@ -177,7 +183,7 @@ Then, in `server.js` we need to add some production specific logic by checking `
 
 - Move the creation and all usage of the `vite` dev server behind dev-only conditional branches, then add static file serving middlewares to serve files from `dist/client`.
 
-Refer to the [Vue](https://github.com/vitejs/vite-plugin-vue/tree/main/playground/ssr-vue) and [React](https://github.com/vitejs/vite-plugin-react/tree/main/playground/ssr-react) demos for a working setup.
+Refer to the [example projects](#example-projects) for a working setup.
 
 ## Generating Preload Directives