chore: Integrate OpenAI API for completions on Ignition error page.

- Add OpenAI API to composer dev requirements.
- Add OpenAI API key to environment variables in .env.example.

composer.json

@@ -39,6 +39,7 @@
         "laravel/sail": "^1.18",
         "mockery/mockery": "^1.4.4",
         "nunomaduro/collision": "^7.0",
+        "openai-php/client": "^0.6.1",
         "phpunit/php-code-coverage": "^10.0",
         "phpunit/phpunit": "^10.1",
         "spatie/laravel-ray": "^1.12",