Provide a way to define and generate full example tables as part of the model

[AlexanderWert]

Today, end-to-end example tables for individual semantic conventions (such as this) are being defined in markdown.

Problem with that approach is to keep them up-to-date with changes in the model yaml files.

I'm proposing to provide a way to define end-to-end examples as part of semantic conventions in the yaml files and include in the tooling a way for generating these example tables.