refactor(website): extract layouts and use more server components (#9027)

Closes https://github.com/discordjs/discord.js/issues/8920
Closes https://github.com/discordjs/discord.js/issues/8997

apps/website/src/components/Panel.tsx

@@ -0,0 +1,10 @@
+import type { PropsWithChildren } from 'react';
+
+export function Panel({ children }: PropsWithChildren) {
+	return (
+		<>
+			{children}
+			<div className="border-light-900 dark:border-dark-100 -mx-8 border-t-2" />
+		</>
+	);
+}