Improve AI handling of reveal-count effects

[vanja-ivancevic]

• Evaluate any-number self-reveal effects from a detached LKI host containing the cards the AI can reveal, without modifying the live card or remembered state.
• Reuse Forge's normal AbilityUtils and SVar evaluation for the full subability chain, including Amount, Twice, and Chroma expressions.
• Add a narrow per-API evaluation-host hook at the controller's existing alternate-host boundary, with host and cast-state restoration in try/finally.
• Decline the effect when no eligible cards can be revealed, allow the affected cards in curated AI decks while retaining their random-deck exclusion, and identify Scent of Nightshade as a curse for targeting.
• This prepares the reveal-count cards needed by a Fallen Empires Adventure dungeon while improving the same mechanics generally.
• Verified with focused game-state scenarios for Scent of Cinder, Phosphorescent Feast's Chroma expression, an empty reveal set, and Cinder Seer's activated ability; the live host was unchanged after every evaluation.

[vanja-ivancevic]

Post-revision self-review: I traced this hook through canPlayAndPayFor and checked every current any-number self-reveal script it can match. It creates one detached LKI host per evaluation, does not interpret SVars or mutate live card/game state, and leaves the normal API path to evaluate ordinary counts, operators, and Chroma. Existing matches such as Rosheen, Roaring Prophet and Sacellum Godspeaker use the same reveal-to-remembered semantics. The twelve scripts changed here remain AI:RemoveDeck:Random, so they are available to curated AI decks such as Adventure NPC decks but remain excluded from random deck generation. The four focused scenarios and a clean forge-ai reactor build pass.