Windows Library builder instance

[partouf]

We need a Windows machine that is able to clone, build and package libraries.

• Needs mounting of smb
• Needs cmake
• Needs python
• https://github.com/compiler-explorer/infra/blob/main/ce_install.ps1 can be used to start ce_install
• Will need a new LibraryBuilder implementation rewritten specifically for Windows, currently there's a lot of Linux assumptions (.so/.a files, .sh scripting)
• Might want to consider forcing package_install to be true, so that we don't need to copy over every library source directory to smb
• Can consider to leave out make support, but leave in cmake support
• cshared can be used theoretically, but it would require users to dynamically link to the .dll's only - as you might not be able to produce a .lib intermediate that works with every compiler - etc
• init/settings.yml will require a new os
• Would be nice to have a papertrail, but not sure how to do that in Windows