Changes proposed in this pull request

This PR is a preamble to a potential solution for Cantera/enhancements#39 , which replaces f-string based code blocks used for the .NET interface by corresponding Jinja templates. In addition, it adds logging as well as service methods to data classes. The PR anticipates/backports some changes envisioned by a development branch that targets an autogenerated version of CLib (ischoegl:sourcegen-doxygen-comments) and should reduce the size of upcoming PRs.

The template approach makes for more readable code, and should both simplify future enhancements and help with long-term maintenance of various generated API's.

Illustration

C# code blocks are defined as templates that are added in a single templates.yaml file, e.g.

csharp-derived-handle: |-
  class {{ derived_class_name }} : {{ base_class_name }} { }

csharp-property-int-double: |-
  public {{ prop_type }} {{ cs_name }}
  {
      get => InteropUtil.CheckReturn(
          LibCantera.{{ getter }}(_handle));
      {%- if setter %}
      set => InteropUtil.CheckReturn(
          LibCantera.{{ setter }}(_handle, value));
      {%- endif %}
  }

csharp-scaffold-interop: |-
  {{ preamble }}

  using System.Runtime.InteropServices;

  namespace Cantera.Interop;

  static partial class LibCantera
  {
      {% for function in cs_functions %}
      {{ function | indent(4) }}
      {% endfor %}
  }

Checklist

• The pull request includes a clear description of this code change
• Commit messages have short titles and reference relevant issues
• Build passes (scons build & scons test) and unit tests address code coverage
• Style & formatting of contributed code follows contributing guidelines
• The pull request is ready for review