[tess.example.yml] arranging TeSS::Config.feature list

[kennethrioja]

Summary of changes

• Organizing the list of features in tess.example.yml

Motivation and context

• As I am starting to add a certain number of features, it would make sense to arrange them instead of just randomly throwing each feature in the feature bag – as an LLM may sell it "This drastically improves the DX"
• For new TeSS maintainers this arrangement might help + I can see this list being matched with a devs' documentation that explains all features and its effects/changes on the platform.

Checklist

• I have read and followed the CONTRIBUTING guide.
• I confirm that I have the authority necessary to make this contribution on behalf of its copyright owner and agree
  to license it to the TeSS codebase under the
  BSD license.