Port to Next.js with static export for Cloudflare Pages

- Create Next.js app with TypeScript, Tailwind, and Postcss
- Extract API logic, types, and utilities to lib/
- Build React components for Race Results, Driver Standings, Points Key, and D3 Chart
- Use environment variables for API credentials (NEXT_PUBLIC_*)
- Static export (output: 'export') for Cloudflare Pages deployment
- D3 chart rendered client-side with dynamic import
- Update deploy workflow to build and deploy ./out directory
- Remove original public/index.html

src/app/layout.tsx

@@ -0,0 +1,23 @@
+import type { Metadata } from "next";
+import { Inter } from "next/font/google";
+import "./globals.css";
+
+const inter = Inter({ subsets: ["latin"] });
+
+export const metadata: Metadata = {
+  title: "ACC Championship Leaderboard",
+};
+
+export default function RootLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return (
+    <html lang="en">
+      <body className={`${inter.className} bg-gray-900 text-gray-200 p-4 md:p-8`}>
+        {children}
+      </body>
+    </html>
+  );
+}