feat: antagonist gun selector

src/core/blitzkit/uniqueGuns.ts

@@ -0,0 +1,18 @@
+import { forEachRight } from 'lodash';
+import { GunDefinition, TurretDefinition } from './tankDefinitions';
+
+export function uniqueGuns(turrets: TurretDefinition[]) {
+  const gunIds = new Set<number>();
+  const guns: { turret: TurretDefinition; gun: GunDefinition }[] = [];
+
+  forEachRight(turrets, (turret) => {
+    forEachRight(turret.guns, (gun) => {
+      if (!gunIds.has(gun.id)) {
+        gunIds.add(gun.id);
+        guns.push({ turret, gun });
+      }
+    });
+  });
+
+  return guns;
+}