style: move language selector to top of README

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sanbuphy

README.md

@@ -1,3 +1,5 @@
+[English](https://walkinglabs.github.io/learn-harness-engineering/en/) · [中文](https://walkinglabs.github.io/learn-harness-engineering/zh/) · [Русский](https://walkinglabs.github.io/learn-harness-engineering/ru/) · [Tiếng Việt](https://walkinglabs.github.io/learn-harness-engineering/vi/) | [**中文 README**](./README-CN.md)
+
 # Learn Harness Engineering
 
 > **A project-based course on building the environment, state management, verification, and control mechanisms that make AI coding agents work reliably.**
@@ -9,10 +11,6 @@ Learn Harness Engineering is a course dedicated to the engineering of AI coding
 - [Anthropic: Harness design for long-running application development](https://www.anthropic.com/engineering/harness-design-long-running-apps)
 - [Awesome Harness Engineering](https://github.com/walkinglabs/awesome-harness-engineering)
 
-[**Website & Docs**](https://walkinglabs.github.io/learn-harness-engineering/) | [**中文 README**](./README-CN.md)
-
-Docs available in: [English](https://walkinglabs.github.io/learn-harness-engineering/en/) · [中文](https://walkinglabs.github.io/learn-harness-engineering/zh/) · [Русский](https://walkinglabs.github.io/learn-harness-engineering/ru/) · [Tiếng Việt](https://walkinglabs.github.io/learn-harness-engineering/vi/)
-
 > **Quick start?** The [`skills/harness-creator/`](./skills/) skill can help you scaffold a production-grade harness (AGENTS.md, feature lists, init.sh, verification workflows) for your own project in minutes.
 
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