chore: ignore generated next-env.d.ts in eslint config

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: joker23

.eslintrc.js

@@ -32,6 +32,7 @@ module.exports = {
     '**/server-ai/examples/chat-judge/**',
     '**/server-ai/examples/direct-judge/**',
     '**/fromExternal/**',
+    '**/next-env.d.ts',
   ],
   rules: {
     'no-param-reassign': 'error',