docs: 新增 QCA Realtime Web 接入 Recipe（中英文）

[LibraTang]

Summary

• Content type: Recipe
• Locale: zh-CN / en-US（英文通过 translation_of 关联中文原文）
• Demo source included: no
• Target audience: 已有 Forward Template、希望在 Web 应用中接入实时语音的开发者。
• User problem and expected outcome: 从创建 Conversation 开始，介绍 WebSocket 中继鉴权、文字与音频收发、Work 进度、打断、重连和结束通话，并提供逐项验证标准。新增中英文两版文章，完整示例链接到官方 Quickstart。

Sources and assets

• Public sources used:
  • 原文，由投稿者提供并改编为 Recipe。
  • 创建 Conversation。
  • 建立 Conversation 连接。
  • 官方 Quickstart，Apache-2.0；代码链接固定到 commit 339bfc09f307064051161e124fa5d9f1099ec491，TypeScript 示例复用其中的模块。
• Asset owner and license: 正文及本次绘制的 Mermaid 时序图按仓库 CC BY 4.0 提交；示例代码遵循 Apache-2.0 规则。无图片、客户数据或第三方媒体素材，无新增依赖或 Demo。
• Originality: 基于以上公开资料整理；英文版注明 AI 翻译，不声明全部内容均为原创。

Specialist review

• 请 Maintainer 核对公开 Realtime API 的产品语义及接入步骤。
• npm run check 通过：68 项测试，12 篇内容校验，Demo、链接、Catalog 和预览构建检查。
• TypeScript 片段对照 Quickstart 模块通过严格类型检查；两版 TypeScript 代码及来源链接一致；JSON 解析、Shell 语法和敏感模式检查通过。
• 本轮未执行真实服务的语音端到端联调；文中验证表用于接入后的实际验证。

Author checklist

• I used exactly one author and no more than five approved tags.
• The article has at least three ## sections and no hand-written table of contents.
• I did not use GitHub Alerts, video, raw HTML, JavaScript, MDX, iframe, remote images, SVG, or interactive content.
• Images are local PNG, JPEG, or WebP files with meaningful alternative text and documented rights. (N/A: no images.)
• The contribution contains no credentials, customer data, personal information, internal links, or unreleased capabilities.
• If a Demo is included, demos/<slug>/ matches the owner article, and the article contains the exact GitHub Demo link. (N/A: no Demo.)
• If a Demo is included, its README documents prerequisites, setup, run, verification, cleanup, and cost/safety considerations. (N/A: no Demo.)
• Demo configuration uses placeholders; no dependency cache, build output, binary, archive, nested Git metadata, or symbolic link is included. (No Demo; article credentials use placeholders.)
• I disclosed the origin and license of Demo source, dependencies, fixtures, and third-party assets. (Public code source disclosed above; no Demo or additional assets.)
• I reviewed the generated preview locally or from the required GitHub Actions checks.
• Every commit contains a Signed-off-by trailer.
• I understand that maintainer Merge to main is the publication event.

Maintainer Demo review

No Demo is included; the following items are not applicable, for Maintainer confirmation.

• Not applicable, or a Maintainer reviewed the Demo README and source manually.
• Not applicable, or the claimed result, cleanup, billable operations, permissions, and destructive side effects were reviewed.