main: 引入 AgentProvider 流式事件与 OpenAI 兼容适配

- 增加流式事件流支持，Provider 输出 `message.delta` 等事件
- 实现 OpenAI 兼容适配器，包括 RequestBuilder、ApiClient 等模块
- 更新 Agent Run 逻辑，支持流式增量写入与模型完成状态管理
- 扩展配置项 `agent.openai.*`，支持模型、密钥等配置
- 优化文档，完善流式事件与消息类型说明
- 增加单元测试，覆盖 Provider 和 OpenAI 适配相关逻辑
- 更新环境变量与配置示例，支持新功能

AGENTS.md

@@ -4,7 +4,7 @@
 # Laravel Boost Guidelines
 
 The Laravel Boost guidelines are specifically curated by Laravel maintainers for this application. These guidelines should be followed closely to enhance the user's satisfaction building Laravel applications.
-
+注意我们使用中文作为自然语言。
 ## Foundational Context
 This application is a Laravel application and its main Laravel ecosystems package & versions are below. You are an expert with them all. Ensure you abide by these specific packages & versions.
 
@@ -219,7 +219,7 @@ protected function isAccessible(User $user, ?string $path = null): bool
 
 ### Running Tests
 - Run the minimal number of tests, using an appropriate filter, before finalizing.
-- To run all tests: `docker compose run --rm app php artisan test`.
-- To run all tests in a file: `docker compose run --rm app php artisan test tests/Feature/ExampleTest.php`.
-- To filter on a particular test name: `docker compose run --rm app php artisan test --filter=testName` (recommended after making a change to a related file).
+- To run all tests: `docker compose exec --rm app php artisan test`.
+- To run all tests in a file: `docker compose exec --rm app php artisan test tests/Feature/ExampleTest.php`.
+- To filter on a particular test name: `docker compose exec --rm app php artisan test --filter=testName` (recommended after making a change to a related file).
 </laravel-boost-guidelines>