feat: module 0 rewrite trap

Naive engine in Rust and TypeScript (immediate damage, inline triggers,
recursive Deathrattles, cards defined in the engine) with
test_00_naive_runs and the expected-fail test_00_real_rules_whirlwind_order,
plus the Module 0 lesson.

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

naive-engine/ts/tests/test_00.test.ts

@@ -0,0 +1,31 @@
+// Module 0 tests for the naive engine. See course/00-rewrite-trap/lesson.md.
+import { expect, test } from "vitest";
+import { Game } from "../src/engine";
+
+test("test_00_naive_runs", () => {
+  const game = new Game();
+  const hoarder = game.summon("Loot Hoarder");
+  game.dealDamage(hoarder, 1);
+  expect(game.boardNames()).toEqual([]); // Loot Hoarder is gone
+  expect(game.cardsDrawn).toBe(1); // its Deathrattle draws one card
+});
+
+// EXPECTED TO FAIL. This test states the order the real game uses (all damage
+// first, then damage triggers in order of play, then deaths and Deathrattles).
+// The naive engine cannot produce it. Read course/00-rewrite-trap/lesson.md,
+// "Predict", before changing anything here.
+test.fails("test_00_real_rules_whirlwind_order", () => {
+  const game = new Game();
+  game.summon("Acolyte of Pain"); // played first
+  game.summon("Loot Hoarder");
+  game.cast("Whirlwind");
+  expect(game.log).toEqual([
+    "damaged Acolyte of Pain 1",
+    "damaged Loot Hoarder 1",
+    "triggered Acolyte of Pain",
+    "drew a card",
+    "died Loot Hoarder",
+    "deathrattle Loot Hoarder",
+    "drew a card",
+  ]);
+});