In order to provide a better UX for .NET developers, this repo should have support for creating new ref packs from a Windows environment. There are two phases of support needed.

1. Add ability to run the generate tooling from a Windows environment. Today the generate tooling is accessible only via a bash script.
2. Add ability to run the source-build leg from a Windows environment. This is important to be able to detect prebuilts locally. This will eventually be needed for .NET 9.0 as part of Enable source-build for Windows source-build#2910.

The first phase has value and is something that can be delivered without the second phase.