Add windows build

docs/clients/desktop/features.md

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+# :material-decagram: Features
+
+#### Service
+
+SFW runs sing-box as a system service, so no administrator elevation is required for daily use.
+
+### Chore
+
+* The working directory is located at `C:\ProgramData\sing-box-daemon`

docs/clients/desktop/index.md

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+---
+icon: material/laptop
+---
+
+# sing-box for Desktop
+
+SFW allows users to manage and run local or remote sing-box configuration files, and provides
+platform-specific function implementation, such as TUN transparent proxy implementation.
+
+Linux support is on the way.
+
+## :material-graph: Requirements
+
+* Windows 10+ (x64 / x86 / arm64)
+
+## :material-download: Download
+
+* [GitHub Releases](https://github.com/SagerNet/sing-box/releases)
+
+## :material-source-repository: Source code
+
+* [GitHub](https://github.com/SagerNet/sing-box-for-desktop)