feat(cerebras): add support for Cerebras provider || feat(cerebras): add support for Cerebras provider

[Aias00]

refer: https://inference-docs.cerebras.ai/introduction

• Implemented the Cerebras provider with necessary request and response handling.
• Added configuration validation and default capabilities for the Cerebras service.
• Included unit tests for configuration parsing, request headers, request body, response headers, and response body handling.
• Updated README and documentation to reflect the new provider and its usage examples.

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

---

refer: https://inference-docs.cerebras.ai/introduction

• Implemented the Cerebras provider with necessary request and response handling.
• Added configuration validation and default capabilities for the Cerebras service.
• Included unit tests for configuration parsing, request headers, request body, response headers, and response body handling.
• Updated README and documentation to reflect the new provider and its usage examples.

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[lingma-agents]

新增 Cerebras 供应商支持并更新文档

变更概述

• 新功能
  • 新增对 Cerebras AI 供应商的支持，包括请求和响应处理逻辑。
  • 实现了 Cerebras 供应商的配置验证和默认能力设置。
  • 添加了针对 Cerebras 的单元测试，覆盖配置解析、请求头、请求体、响应头和响应体处理。
• 文档
  • 在中文和英文 README 中添加了 Cerebras 供应商的配置说明和使用示例。
  • 更新了供应商配置字段的详细说明表格。
  • 添加了 Cerebras 服务的 OpenAI 协议代理使用示例，包括配置、请求和响应示例。

变更文件

文件路径	变更说明
plugins/​wasm-go/​extensions/​ai-proxy/​README.​md	更新了 README 文档，添加了 Cerebras 供应商的相关配置说明和使用示例。更新了供应商配置字段的详细说明表格，并添加了 Cerebras 服务的 OpenAI 协议代理使用示例。
plugins/​wasm-go/​extensions/​ai-proxy/​README_​EN.​md	更新了英文 README 文档，添加了 Cerebras 供应商的相关配置说明和使用示例。更新了供应商配置字段的详细说明表格，并添加了 Cerebras 服务的 OpenAI 协议代理使用示例。

---

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.96%. Comparing base (ef31e09) to head (9848457).
⚠️ Report is 725 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2913      +/-   ##
==========================================
+ Coverage   35.91%   44.96%   +9.05%     
==========================================
  Files          69       82      +13     
  Lines       11576    13377    +1801     
==========================================
+ Hits         4157     6015    +1858     
+ Misses       7104     7015      -89     
- Partials      315      347      +32     

see 80 files with indirect coverage changes

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[johnlanni]

@Aias00 Please fix the conflicts

[Aias00]

@Aias00 Please fix the conflicts

done