feat: make all cards use 1 deck slot regardless of rarity

Override getCardDeckSlots to always return 1 so mythic and higher
rarity cards don't take multiple slots in the 30-slot deck.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

scripts/vscripts/cards/cardsystem.lua

@@ -255,11 +255,6 @@ function CardSystem.prototype.____constructor(self, playerId)
     )
 end
 function CardSystem.getCardDeckSlots(self, cardId)
-    local cardData = ____exports.CardSystem.cardData[cardId]
-    local configured = __TS__Number(cardData and cardData.deck_slots)
-    if __TS__NumberIsFinite(configured) and configured > 0 then
-        return math.floor(configured)
-    end
     return 1
 end
 function CardSystem.getDeckUsedSlots(self, cards)