feat: Skeleton Plugin refactor (#1660)

sites/skeleton.dev/src/hooks.server.ts

@@ -0,0 +1,18 @@
+import type { Handle } from '@sveltejs/kit';
+
+export const handle: Handle = async ({ event, resolve }) => {
+	let theme = '';
+
+	const cookieTheme = event.cookies.get('theme');
+
+	if (cookieTheme) {
+		theme = cookieTheme;
+	} else {
+		event.cookies.set('theme', 'skeleton');
+		theme = 'skeleton';
+	}
+
+	return await resolve(event, {
+		transformPageChunk: ({ html }) => html.replace('data-theme=""', `data-theme="${theme}"`)
+	});
+};