cubicweb #1916015 [diet] move external page embeding feature to its own cube [validation pending]

this may need to update the link cube as well

prioritynormal
typeenhancement
done in3.17.0
load0.500
load left0.000
closed by#47dd517d6c6f [web/views] extract cube embed (closes #1916015)
patch[web/views] extract cube embed (closes #1916015) [applied]