move ecs related code to own folder

src/lib/ecs/component/RepairToolComponent.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include <optional>
+
+#include "entt/entity/entity.hpp"
+
+struct RepairToolComponent
+{
+    float ratePerTick;
+    float range;
+    std::optional<entt::entity> currentTarget;
+};