MAGE-973 Default renderingContent

[cammonro]

Summary

This primary of objective of this PR is introduce default renderingContent that will help power dynamicWidgets. It also includes some refactoring:

• New FacetBuilder service
• Shared rawFacets between renderingContent and attributesForFaceting
• Separating logic into functions by area of concern: groups, categories,
• Introducing constants for Magento integration specific key conventions
• Added unit tests and reorganized existing

During implementation it was observed that our currency handling is flawed as it does not handle scoped currency config by store but this PR does not address that issue. That will be addressed in a separate ticket.

Result

renderingContent persisted as Facet Display in Dashboard:

All tests passed (including reorganized tests)

[damcou]

Very good work 🚀

I just have questions more than changes requested, I think you can merge it afterwards