新增桌面应用与启动器部署文档，更新 Windows 部署指南

[astrbot-doc-agent]

Generated automatically by astrbot-docs-agent-server.

• Upstream PR: chore(README): updated with README.md AstrBot#5375
• Trigger: PR merged

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AI change summary:

• zh/deploy/astrbot/community-deployment.md：新增「桌面应用部署」与「启动器一键部署」章节。
• en/deploy/astrbot/community-deployment.md：新增「Desktop Application (Tauri)」与「AstrBot Launcher」章节。
• en/deploy/astrbot/windows.md：更新内容结构，将 AstrBot Launcher 设为推荐部署方式，保留旧版安装器作为备选。
• i18n：community-deployment.md 中英文已同步；windows.md 英文版已同步至中文版结构。
• 导航：未新增页面，无需更新侧边栏。

Please review manually before merging.

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Experimental bot notice:

• This output is generated by AstrBot-Doc-Agent for review only.
• It does not represent the final documentation form.

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