cubicweb-jsonb #16392356 Add RQL function to test for JSON containment [validation pending]

For example, we should be able to tell that {"a": 1} in contained in {"a": 1, "b": 2} (Equivalent of Postgres @< jsonb operator).

prioritynormal
typeenhancement
done in0.1.0
load left0.000
closed by#89eef72cccb8 Add some functions to query jsonb type
patchAdd some functions to query jsonb type [applied]