Synchronize GitHub Codespaces direct links across all localized documents - #39

This PR synchronizes the main English documents with all localized versions by adding the missing GitHub Codespaces direct links that were recently added to the English documentation.

Changes Made

Missing GitHub Codespaces Direct Links

The main English documents (README.md and docs/00-setup.md) included direct GitHub Codespaces links with badges:

[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/microsoft/github-copilot-vibe-coding-workshop)

However, all localized versions were missing these direct links and instead used complex multi-step instructions with images.

Files Updated

• 6 localized README.md files: Added GitHub Codespaces badge and split prerequisite text to match English structure
• 6 localized setup documentation files: Replaced complex image-based instructions with simple direct links

Languages Synchronized

• Spanish (es-es)
• French (fr-fr)
• Japanese (ja-jp)
• Korean (ko-kr)
• Portuguese (pt-br)
• Chinese (zh-cn)

Before/After Example

Before (localized versions):

## Prerequisites
During this workshop, GitHub Codespaces is highly recommended because there's no need for preparation, except a web browser. However, if you really need to use your machine, make sure you've installed everything identified below.

After (now matches English structure):

## Prerequisites
During this workshop, GitHub Codespaces is highly recommended because there's no need for preparation, except a web browser.

[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/microsoft/github-copilot-vibe-coding-workshop)

However, if you really need to use your machine, make sure you've installed everything identified below.

Verification

• ✅ All localized documents now have exactly 1 GitHub Codespaces direct link (matching main English docs)
• ✅ Line count consistency maintained (README: 110→114, setup docs: 350→354)
• ✅ Translation disclaimers preserved in localized versions
• ✅ All structural elements synchronized across languages

Fixes #38.

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