[Marc-André Moreau (mamoreau-devolutions)]

Summary

• Switch the MSI packager to the WixSharp WiX 4+ NuGet stream.
• Migrate the per-machine scope and 64-bit component authoring to the WiX 4 schema.
• Install pinned WiX CLI 5.0.2 through WinGet in the MSI CI job instead of Chocolatey.
• Update local MSI build instructions.

Validation

• dotnet build package -c Release -p:Version=0.1.0 -p:IncludeSourceRevisionInInformationalVersion=false
• Generated non-empty x64 and ARM64 test MSIs using WiX CLI 5.0.2.