add flecs::System to C++ API
@@ -110,6 +110,9 @@ using TickSource = EcsTickSource;
using Query = EcsQuery;
using Trigger = EcsTrigger;
+/* Builtin opaque components */
+static const flecs::entity_t System = ecs_id(EcsSystem);
+
/* Builtin set constants */
static const uint8_t DefaultSet = EcsDefaultSet;
static const uint8_t Self = EcsSelf;
