fix: 同步assets资源到i18n英文目录，修复构建失败

[mashagua]

问题

PR #4 合并后，Docusaurus 构建英文版失败，报错：

Error: Markdown image with URL `./assets/sales-data-analysis-report.jpeg` in source file "i18n/en/.../06-data-analysis-agent.md" couldn't be resolved to an existing local image file.

原因

英文翻译文件（i18n/en/）引用了 ./assets/ 下的图片，但 assets 资源只放在了中文 docs/ 目录下，英文目录下没有对应文件。

修复

将 3 个图片文件和 6 个资源文件同步到英文目录：

• ✅ sales-data-analysis-report.jpeg
• ✅ microservice-architecture.png
• ✅ gucci-products-scraping.png
• ✅ flowchart/microservice-architecture.drawio
• ✅ web-scraping/gucci_handbags.xlsx
• ✅ data-analysis/ 下的 docx/pdf/xlsx 文件

[vercel]

@mashagua is attempting to deploy a commit to the yige's Team Team on Vercel.

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[mashagua]

Hi @yi-ge, this PR fixes the English version build error (missing image assets in i18n/en/). All images have been synced. Could you please review and merge when you get a chance? Thanks! 🙏