cubicweb #1916018 [diet] move isioc to its own cube [validation pending]

prioritynormal
typeenhancement
done in3.17.0
load0.500
load left0.000
closed by#8ca1a0da5a29 [web/views] extract cube sioc (closes #1916018)
patch[web/views] extract cube sioc (closes #1916018) [applied]