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

.gitea/workflows/deploy.yaml

@@ -13,9 +13,15 @@ jobs:
         with:
           node-version: 20
 
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
       - name: Publish to Cloudflare
         uses: cloudflare/wrangler-action@v3
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
-          command: pages deploy ./public --project-name=grid-gladiators-leaderboard
+          command: pages deploy ./out --project-name=grid-gladiators-leaderboard