Translate examples from JSON to YAML in 1.0.0-alpha1 DSL

[cdavernas]

What would you like to be added:

Translate/optimize pre 1.0.0-alpha1 examples.

Examples, like everything else, should be written in YAML, for the sake of readability and to leverage at best the new syntax.

Why is this needed:

Provide, in addition to /ctk/features a good variety of examples.

[ricardozanini]

Depends on:

• Fix #852 - Add cache path to node CI and remove examples hydration pipeline #861

[ricardozanini]

@cdavernas I think we can slowly add examples to the examples dir as we progress fixing schema bugs like in #863.

I'll hold this for now once we create a tool to migrate from version 0.8 to 1.0.0. So we can use the former examples to test the tooling. :)