Using template in Visual Studio creates two .sln files

[LottePitcher]

Which version of the template have you installed?

No response

Bug description

I know that there is no ide.host.json in templates.config yet to control how the parameters appear when adding in VS, but when I tried this it resulted in two .sln files being created: the one from my template and the one that VS creates when adding a 'solution'. Until that is fixed people shouldn't use VS, and so worrying about the additional details isn't relevant.

Perhaps the .sln should come out of the template and be created where VS wants to create it, and then the solution contents added by template postActions? Needs some investigation. For now, the readme clearly states to use CLI only