Add sveltekit guide (#4180)

docs/guides/ecosystem/sveltekit.md

@@ -0,0 +1,65 @@
+---
+name: Build an app with SvelteKit and Bun
+---
+
+Use `bunx` to scaffold your app with the `create-svelte` CLI. Answer the prompts to slect a template and set up your development environment.
+
+```sh
+$ bunx create-svelte my-app
+┌  Welcome to SvelteKit!
+│
+◇  Which Svelte app template?
+│  SvelteKit demo app
+│
+◇  Add type checking with TypeScript?
+│  Yes, using TypeScript syntax
+│
+◇  Select additional options (use arrow keys/space bar)
+│  None
+│
+└  Your project is ready!
+
+✔ Typescript
+  Inside Svelte components, use <script lang="ts">
+
+Install community-maintained integrations:
+  https://github.com/svelte-add/svelte-add
+```
+
+---
+
+Once the project is initialized, `cd` into the new project and install dependencies.
+
+```sh
+$ cd my-app
+$ bun install
+```
+
+---
+
+Then start the development server with `bun --bun run dev`.
+
+To run the dev server with Node.js instead of Bun, you can omit the `--bun` flag.
+
+```sh
+$ bun --bun run dev
+  $ vite dev
+
+  Forced re-optimization of dependencies
+
+    VITE v4.4.9  ready in 895 ms
+
+    ➜  Local:   http://localhost:5173/
+    ➜  Network: use --host to expose
+    ➜  press h to show help
+```
+
+---
+
+Visit [http://localhost:5173](http://localhost:5173/) in a browser to see the template app.
+
+{% image src="https://github.com/oven-sh/bun/assets/3084745/7c76eae8-78f9-44fa-9f15-1bd3ca1a47c0" /%}
+
+---
+
+If you edit and save `src/routes/+page.svelte`, you should see your changes hot-reloaded in the browser.