Implement the 005-set-initiative feature that adds initiative values to combatants with automatic descending sort and active turn preservation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/domain/src/index.ts

@@ -9,6 +9,7 @@ export type {
 	CombatantRemoved,
 	CombatantUpdated,
 	DomainEvent,
+	InitiativeSet,
 	RoundAdvanced,
 	TurnAdvanced,
 } from "./events.js";
@@ -16,6 +17,10 @@ export {
 	type RemoveCombatantSuccess,
 	removeCombatant,
 } from "./remove-combatant.js";
+export {
+	type SetInitiativeSuccess,
+	setInitiative,
+} from "./set-initiative.js";
 export {
 	type Combatant,
 	type CombatantId,