add dark mode

src/components/theme-provider.tsx

@@ -0,0 +1,11 @@
+'use client'
+
+import { ThemeProvider as NextThemesProvider } from 'next-themes'
+import type * as React from 'react'
+
+export function ThemeProvider({
+  children,
+  ...props
+}: React.ComponentProps<typeof NextThemesProvider>) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>
+}