Generated SDKs for Go and .NET [GA]

### Value Prop

The fully generated SDKs for Go and .NET will be released in general availability (GA). This follows the preview version that GitHub introduced several months ago in the blog post [Our Move to Generated SDKs](https://github.blog/2024-01-03-our-move-to-generated-sdks/). In this release, the SDKs will be production-ready and offer significant enhancements:

- **Broader API support:** Easily access more GitHub API endpoints than with previous SDKs.
- **Automatic rate limit management:** Avoid exceeding API rate limits with built-in adjustments based on HTTP response headers.
- **Simplified authentication:** Easily authenticate as a GitHub App, enabling finer-grained permissions and higher primary API rate limits for Enterprise Cloud accounts.

### Expected Outcome

By adopting the GA generated SDKs for Go and .NET, teams will be more productive at integrating with GitHub using expanded and up-to-date API support, enjoy more stable integrations with automatic rate limit handling, and leverage higher rate limits and fine-grained security controls through simplified GitHub App authentication.

该 issue 未指定任何文件、测试或入口点；首先定位生成的 Go 和 .NET SDK 及其 preview 发布流程所在的位置。完成标准是将两个 SDK 都发布为正式可用版本，并提供更广泛的 API 支持、自动速率限制管理和简化的 GitHub App 身份验证。

由索引模型根据 Issue 内容生成。