add settings reset

libs/include/entt/process/fwd.hpp

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+#ifndef ENTT_PROCESS_FWD_HPP
+#define ENTT_PROCESS_FWD_HPP
+
+#include <cstdint>
+#include <memory>
+
+namespace entt {
+
+template<typename, typename>
+class process;
+
+template<typename = std::uint32_t, typename = std::allocator<void>>
+class basic_scheduler;
+
+/*! @brief Alias declaration for the most common use case. */
+using scheduler = basic_scheduler<>;
+
+} // namespace entt
+
+#endif