Add Orchard Core templates to wiki

[Piedone]

Is your feature request related to a problem? Please describe.

The https://github.com/dotnet/templating/wiki/Available-templates-for-dotnet-new wiki page is missing the code generation templates of Orchard Core.

Describe the solution you'd like.

Please add a line about them under C# Templates. I'd do that but GitHub wikis can't be contributed to. This would be the content in the table:

Name:

[Orchard Core](https://docs.orchardcore.net/en/latest/getting-started/templates/) - Web app and extension templates for the framework and CMS [Orchard Core](https://orchardcore.net/)

Quick install:

dotnet new install OrchardCore.ProjectTemplates

Additional context

Coming from OrchardCMS/OrchardCore#10730.