Windows POC

[kpouget]

Assisted-by-AI: Claude Code

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Summary by CodeRabbit

• New Features

  • Windows VirtGPU backend added alongside Linux with selectable backend support and a Windows host service for WSL2 clients.

• Documentation

  • Extensive multi-platform build, integration, architecture, data-flow, and troubleshooting guides added.

• Build & Deployment

  • New Windows/WSL build and install scripts; CMake updated for platform-specific build options.

• Testing

  • New Windows integration tests and connectivity/firewall validation tools; cross-platform backend validation added.

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