feat: codemod migration to nextjs 15

Author: kevinjosethomas

next-env.d.ts

@@ -2,4 +2,4 @@
 /// <reference types="next/image-types/global" />
 
 // NOTE: This file should not be edited
-// see https://nextjs.org/docs/basic-features/typescript for more information.
+// see https://nextjs.org/docs/pages/api-reference/config/typescript for more information.

next.config.js

@@ -6,9 +6,6 @@ const withTM = require('next-transpile-modules')(['@react-chess/chessground'])
 module.exports = withTM({
   reactStrictMode: false,
   output: 'standalone',
-  experimental: {
-    esmExternals: 'loose',
-  },
   async rewrites() {
     return [
       {