chore: add note that svelte.config.ts support in vps is just the start

Author: dominikg

.changeset/tall-rivers-sleep.md

@@ -3,3 +3,8 @@
 ---
 
 add support for loading typescript svelte config files in runtimes that support it
+
+> [! NOTE]
+> This change only applies to vite-plugin-svelte.
+>
+> To use `svelte.config.ts` in SvelteKit, with the Svelte VSCode extension or other tools reading the svelte config file, you have to wait until support is implemented there.