Add pseudo-accessors for ACTIONs.
Currently, ACTIONs are pairs of an OPERATION and a COMPONENT, and are accessed with CAR and CDR. Try to future-proof these by replacing with ACTION-OP and ACTION-COMPONENT.
Currently, ACTIONs are pairs of an OPERATION and a COMPONENT, and are accessed with CAR and CDR. Try to future-proof these by replacing with ACTION-OP and ACTION-COMPONENT.