cubicweb-nazcaui #4067804 Add schema [validation pending]

Start modeling of Nazca objects, and push them in postcreate

prioritynormal
typebug
done in0.3.0
load0.500
load left0.000
closed by#b7b65ef80d56 [schema] Start modeling of Nazca objects, and push them in postcreate, closes #4067804
patch[schema] Start modeling of Nazca objects, and push them in postcreate, closes #4067804 [folded][schema] Start modeling of Nazca objects, and push them in postcreate, closes #4067804 [applied]