Add native Windows AMD64 and ARM64 releases

[chaqchase]

Summary

• Add native Windows AMD64 and ARM64 CLI release builds with WASM plugin support
• Publish Windows plugin ZIP archives and verify PE runtime imports
• Add PowerShell installation, checksum validation, PATH management, and Windows-safe upgrades
• Make filesystem metadata and permission formatting portable on Windows
• Extend CI, release workflows, documentation, and changelog for Windows support

Testing

• Add native Windows AMD64 and ARM64 CI coverage
• Smoke-test Windows binaries and plugin archives
• Validate PowerShell installer helpers, checksum parsing, custom install paths, and idempotent PATH updates
• Verify static MSVC runtime linking and Windows plugin PE imports