seo: bring meta descriptions into Bing's range, and add IndexNow

Bing Webmaster Tools flags meta descriptions under roughly 90-100
characters. It counts characters, so most Chinese, Japanese and Korean
pages failed even when the text read fine.

- Hand-written descriptions for the key site pages in 11 languages:
  home, pricing, support, team, the blog index and its categories. Plus
  16 docs pages whose text is too short to extend from.
- scripts/fit-meta-descriptions.mjs runs after both builds (v3/build.sh,
  deploy.sh and the docs workflow). It brings every other description to
  120-160 characters, using the page's opening sentences.
- Category descriptions now resolve for the transliterated zh/ja/ko
  slugs. Before, those pages only ever showed the generic text.
- IndexNow: the key file ships with the site from v3/public, and
  scripts/indexnow.mjs submits the live sitemaps. After deploying, each
  workflow submits its own half: the site or the docs.
- Translate the bodies of the Spanish team page and the German support
  page, which were still in English.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

content/dev/_index.zh-tw.md

@@ -3,7 +3,7 @@ title: 開發
 weight: 8
 pre: "<b>3. </b>"
 chapter: true
-description: "RustDesk 的開發文檔，提供安裝、設定、部署與疑難排解指南。"
+description: "面向 RustDesk 貢獻者的開發文件：介紹如何在 Linux、Windows 與 macOS 上從原始碼編譯 RustDesk、需要準備的相依套件與工具鏈、常見編譯問題的排解方式，以及參與這個開源遠端桌面專案、提交程式碼與回報問題的入門資訊。"
 keywords: ["rustdesk development", "build rustdesk", "rustdesk contributor docs", "rustdesk linux build", "rustdesk windows build", "rustdesk macos build"]
 ---