.NET / devon4net code generation is outdated

[shiftwolf]

As a user, I want to generate code for a devon4net WebAPI project so that it is compatible with the current version of the devon4net WebAPI template.

If I generate it now (using OpenAPI), it will generate code that (supposedly) works with an outdated WebAPI template, but which doesn't work with the current version. Some dependencies no longer exist and outdated naming conventions are used.

[NelsonNew]

We should outsource the made template into a separate template set