feat: card/level schemas and verified catalog

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tools/test/fixtures/cards/armorsmith.json

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+{"name":"Armorsmith","type":"minion","cost":2,"attack":1,"health":4,"split":1,"text":[{"kind":"trigger","on":"friendlyMinionDamaged"},{"kind":"effect","effect":{"type":"gainArmor","amount":1}}]}

tools/test/fixtures/cards/baron-rivendare.json

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+{"name":"Baron Rivendare","type":"minion","cost":4,"attack":1,"health":7,"split":0,"text":[{"kind":"aura","modifier":{"type":"triggerMultiplier","trigger":"deathrattle","times":2,"stacking":"max"}}]}

tools/test/fixtures/cards/dread-infernal.json

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+{"name":"Dread Infernal","type":"minion","cost":6,"attack":6,"health":6,"split":1,"text":[{"kind":"trigger","on":"battlecry"},{"kind":"effect","effect":{"type":"dealDamage","target":"allOtherCharacters","amount":1}}]}

tools/test/fixtures/cards/harvest-golem.json

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+{"name":"Harvest Golem","type":"minion","cost":3,"attack":2,"health":3,"split":1,"text":[{"kind":"trigger","on":"deathrattle"},{"kind":"effect","effect":{"type":"summon","card":"Damaged Golem","count":1}}]}

tools/test/fixtures/cards/loot-hoarder.json

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+{"name":"Loot Hoarder","type":"minion","cost":2,"attack":2,"health":1,"split":1,"text":[{"kind":"trigger","on":"deathrattle"},{"kind":"effect","effect":{"type":"draw","count":1}}]}