move ecs related code to own folder

src/lib/ecs/component/WeaponComponent.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <optional>
+
+#include "entt/entity/entity.hpp"
+
+struct WeaponComponent
+{
+    float damage;
+    float range;
+    float fireRateHz;
+    float cooldownTicks;
+    std::optional<entt::entity> currentTarget;
+};