Add cardinality transition operator to holarchy core logic.

[phil-kahrl]

This is a feature request to add cardinality transition operator along with the other logical operators in Holarchy core logic.

The cardinality operator will return true/false based on the cardinality of a passed set of other transition operators being true or false. So the request signature might be something like:

cardinality: { ____types: "jsObject", isTrue: { ____types: "jsArray", operandOperatorVariant: { ____accept: "jsObject" } }, equalTo: { ____accept: "jsNumber" } }