fix ui package, use sv to create

recreated package using sv, marking correctly as a library. seems I was
missing some sveltekit tooling somewhere along the way otherwise.

vite.config.ts

@@ -0,0 +1,7 @@
+import tailwindcss from '@tailwindcss/vite';
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+	plugins: [tailwindcss(), sveltekit()]
+});