Feature in Process: New td examples

[SergioCasCeb]

Here are some new td examples that could work for the redesign of the examples page. Note: This are by no means all of the possible exmaples and I will keep adding new one, hence why there are some categories empty for now.

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[egekorkan]

Some general feedback:

• The top-level folder should be called examples since there will be TD and TM examples as well
• There are some duplicate examples in different categories. I understand that a single TD can be used for multiple example categories but this kind of simple duplication makes it annoying to maintain. However, we need to be able to highlight the important part of an example without breaking the JSON format. Some special keywords maybe? The PR can be still merged and we find a solution later.
• A description is needed for all examples
• File endings should be filename.td.jsonld (see https://github.com/w3c/wot-testing/blob/main/data/input_2022/TD/node-wot/TDs/counter.td.jsonld)
• Folder 10, 11, 12 are missing
• Tests are missing:
  • Tests to check that all are valid TDs
  • Tests for our conventions such as description presence
• Readme in each folder is missing. Let's do the following:
  • The examples can be browsed through GitHub as well so the core readme needs a table of contents
  • Each category has a Readme and the first line after the title # is a single sentence explaining the category.
  • The top readme can also document the missing categories and the ones that are planned