Add support for the dataframe view in the python blueprint API

[abey79]

With the dataframe improvement, it's becoming more and more having explicit support for it in the blueprint API. I assume it should be relatively easy, but we somehow need to address the fact that the view itself is behind an opt-in feature flag.

[abey79]

Doc generation: the dataframe view needs some special casing:

• All archetype should list it as supported by default
• It should list "All archetypes" as "Supported Archetype"