Adds installer/TeamsISO.Installer.wixproj (WixToolset.Sdk 5.0.2 + WixToolset.UI.wixext) plus Package.wxs that produces a per-machine x64 MSI bundling the Release publish output of TeamsISO.App.
Layout: Program Files\\Wild Dragon\\TeamsISO\\, Start Menu shortcut under Programs\\Wild Dragon\\TeamsISO, ARP entry pointing at https://wilddragon.net for both help and about, NoRepair set so users uninstall+install for upgrades. MajorUpgrade is wired so upgrade-in-place from older versions works; downgrade is blocked with a friendly message.
NDI runtime presence is searched (HKLM environment NDI_RUNTIME_DIR_V6) and surfaced as the NDIRUNTIMEDIR property — the install no longer prompts via the deprecated VBScript custom action; instead the WPF app's existing first-run NDI check pops the install link dialog if the runtime is missing. Operators can stage the app before NDI rolls out.
Build:
dotnet publish src/TeamsISO.App/TeamsISO.App.csproj -c Release -r win-x64 -o publish/TeamsISO
dotnet build installer/TeamsISO.Installer.wixproj -c Release
Verified locally: MSI builds clean (0 warnings, 0 errors), produces TeamsISO-Setup-1.0.0-alpha.0.msi (336 KB), summary info reads correctly via WindowsInstaller COM API. Property table contains ARPHELPLINK/ARPURLINFOABOUT/Manufacturer/ProductName/UpgradeCode as expected.
