feat: module 07 rule resolution

Adds IS NOT to the Part II parser and a resolution pass (negation, then
identity lock) that turns parsed rules into the rules in force; harness
gains activeRules() and hasProperty(). A leading NOT now breaks the
sentence instead of being ignored (carried from M6 review). Nouns say
which objects they name ("selects"), so the ALL Expansion Drop is one
line of data. Corrects lesson 06's NOT wording; harness.md M7 details.

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

course/07-rule-resolution/reference/ts/src/engine/death.ts

@@ -0,0 +1,21 @@
+// The Death Creation Step: the one place minions leave play.
+//
+// Damage and destroy effects only mark a minion (0 or less Health, or pending
+// destroy). It stays in play, and keeps triggering, until the outermost Phase
+// ends. Then this step removes every marked minion at once.
+
+import type { Event } from "./event";
+import type { World } from "./world";
+
+/**
+ * Remove every mortally wounded or pending-destroy minion from play, simultaneously.
+ * Returns their Death Events in order of play; empty if nothing died.
+ */
+export function deathCreationStep(world: World): Event[] {
+  const dying = world.minionsInPlay().filter((id) => world.isDoomed(id));
+  // Every position is read before anything moves: removal is simultaneous, and each
+  // Death Event remembers where its minion stood when the step began.
+  const deaths = dying.map((id) => ({ type: "Destroyed" as const, id, position: world.boardIndex(id)! }));
+  for (const { id, position } of deaths) world.kill(id, position);
+  return deaths;
+}