Add "Return" action for rules to enable short-circuit programming

Convoluted if-elseif-elseif-...-else statements are difficult to reason about.

Many languages provide an ability to "return" out of an imperative flow early, when certain base cases eliminate the need to proceed down the main flow (AKA "short-circuit" programming, e.g., for "guard clauses").

Please provide a rule action "Return" that can be used within if-statements.