reconfigure css to allow consumer styling

It's a little jank, but it works. The consumer absolutely MUST have a
file at `$lib/styles/tailwind.css` that contains all necessary tailwind
imports AND also imports the `src/lib/styles/base.css` file from sui.

WILL address this in another commit.

src/routes/+page.svelte

@@ -19,6 +19,8 @@
 	let dateInputValue = $state<Date | undefined>(undefined);
 </script>
 
+<title>sui</title>
+
 <h1 class="mb-4 text-3xl font-bold">sui — Opinionated Svelte 5 UI toolkit</h1>
 
 <p class="mb-4">
@@ -153,7 +155,7 @@
 </div>
 
 <style lang="postcss">
-	@reference '$lib/styles/theme.css';
+	@reference '$lib/styles/tailwind.css';
 
 	.component .title {
 		@apply mb-2 text-lg font-semibold;