Transform current metamodel to sphinx-needs model

[AlexanderLanin]

If we can transform the metamodel on the fly, this will allow us to use our current (simple) validation approach and at the same time be compatible to the rust based tools of useblocks.

[AlexanderLanin]

More precisely we need to evaluate whether the new sphinx-needs metamodel format is suitable for us.

[a-zw]

What "sphinx-needs model" does this refer to? Link?

[ubmarco]

Sphinx-Needs 6 features a new strong tying system and a new schema validation system.
Here are the docs.