use:components and remove storybook integration

src/lib/index.ts

@@ -1 +1,5 @@
-// place files you want to import through the `$lib` alias in this folder.
+// Reusable UI Components
+export { default as Input } from './components/Input.svelte';
+export { default as Button } from './components/Button.svelte';
+export { default as ErrorMessage } from './components/ErrorMessage.svelte';
+export { default as UserInfo } from './components/UserInfo.svelte';