IDs are immutable after creation

include/fggl/ecs/types.hpp

@@ -24,13 +24,13 @@
 namespace fggl::ecs {
 
 	struct entity {
-		std::uint32_t id;
+		const std::uint32_t id;
 	};
 	constexpr const entity NULL_ENTITY = {0};
 	constexpr const entity MAX_ENTITY = {0xFFFFFFFF};
 
 	struct componentID {
-		std::uint32_t id;
+		const std::uint32_t id;
 	};
 	constexpr const entity NULL_COMPONENT = {0};