feat: effect and triggers

src/samples/slay-the-spire-like/system/combat/effects.ts

@@ -79,3 +79,7 @@ export function* getAliveEnemies(state: CombatState) {
         }
     }
 }
+
+export function getCombatEntity(state: CombatState, entityKey: string){
+    return entityKey === 'player' ? state.player : state.enemies.find(e => e.id === entityKey);
+}