clean up consumer styling

Consumer now only imports the styles endpoint from their main CSS file.
Dark mode is currently permanently disabled, I need to add a JS helper
that when used automatically adds the correct class if there is a
preferred color scheme.

Also gets rid of the whole weird thing where the consumer had to have
a SPECIFIC `theme.css` file.

src/lib/TimeInput.svelte

@@ -363,7 +363,7 @@
 </div>
 
 <style lang="postcss">
-	@reference "$lib/styles/tailwind.css";
+	@reference "./styles/reference.css";
 
 	:global(.time-input) {
 		@apply h-16 w-24 text-center text-xl;