refactor(create-vite): add jsdoc for svelte.config.js in svelte-ts template (vitejs#20543)

Co-authored-by: 翠 <[email protected]>

Author: babakfp

packages/create-vite/template-svelte-ts/svelte.config.js

@@ -1,5 +1,6 @@
 import { vitePreprocess } from '@sveltejs/vite-plugin-svelte'
 
+/** @type {import("@sveltejs/vite-plugin-svelte").SvelteConfig} */
 export default {
   // Consult https://svelte.dev/docs#compile-time-svelte-preprocess
   // for more information about preprocessors

packages/create-vite/template-svelte/svelte.config.js

@@ -1,5 +1,6 @@
 import { vitePreprocess } from '@sveltejs/vite-plugin-svelte'
 
+/** @type {import("@sveltejs/vite-plugin-svelte").SvelteConfig} */
 export default {
   // Consult https://svelte.dev/docs#compile-time-svelte-preprocess
   // for more information about preprocessors