Option to filter LOOK_AT view

[morvael]

It is very common for cards game text automation to show a subset of cards from somewhere based on some traits of the card ("filtering"). It would be great if LOOK_AT could be provided a filter condition (or function name) that would allow filtering the cards shown. Something very much like topN now, but filtering on any card field.

["LOOK_AT", "player1", "player1Deck", -1, false, ["EQUAL", "$CARD.sides.A.type", "Event"]]