Create a 'dotnet new' template

[ardalis]

See CleanArchitecture. Create and publish a dotnet new template for worker services that use Clean Architecture.

https://github.com/ardalis/CleanArchitecture/blob/main/CleanArchitecture.nuspec

[niravmsoni]

@ardalis Can you please assign this issue to me? I have raised a pull request for this issue (#205) and would like to track its progress.