chore: delete old static frontend and rename frontend-next to frontend

frontend/next.config.ts

@@ -0,0 +1,10 @@
+import type { NextConfig } from "next";
+
+const nextConfig: NextConfig = {
+  output: 'export',
+  images: {
+    unoptimized: true,
+  },
+};
+
+export default nextConfig;