chore: Add next-themes npm dependency and update layout.tsx to use ThemeProvider

src/components/theme-provider.tsx

@@ -0,0 +1,9 @@
+"use client"
+
+import * as React from "react"
+import { ThemeProvider as NextThemesProvider } from "next-themes"
+import { type ThemeProviderProps } from "next-themes/dist/types"
+
+export function ThemeProvider({ children, ...props }: ThemeProviderProps) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>
+}