Hide `<Area areaAsSubNode>`, limit the parameters of `<Area>` and `<AbsoluteArea>`

[Fgerthoffert]

why is it an attribute or a whole new component?

The goal of the spike is to make API suggestions.

Discussed during refinement: the epic was split into multiple smaller issues so that multiple ppl can work on them in //

[jahia-ci]

If an issue is attached to a project starting with Product Team, it can only be closed if its has a Status of Done

code: INCORRECT_GITHUB_PROJECT_STATUS