feat: added native scheduler

src/detail/scheduler.hpp

@@ -0,0 +1,22 @@
+#pragma once
+#include <functional>
+
+namespace fxn
+{
+    class NativeScheduler
+    {
+    private:
+        struct Impl;
+        Impl* m_Impl;
+
+    private:
+        NativeScheduler();
+        ~NativeScheduler();
+
+    public:
+        static NativeScheduler& GetInstance();
+
+    public:
+        void Schedule(const std::function<void()>& task);
+    };
+}