add simple runtime; fix the issue of crashing when creating file and folder; some tweaks

PrismRuntime/CMakeLists.txt

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+project(PrismRuntime)
+
+file(GLOB_RECURSE SRC_SOURCE ./PrismRuntime/**.cpp)
+
+add_executable(${PROJECT_NAME} WIN32 ${SRC_SOURCE})
+target_compile_definitions(${PROJECT_NAME} PRIVATE PRISM_GUI)
+target_link_libraries(${PROJECT_NAME} PRIVATE Prism-static)
+
+
+add_executable(${PROJECT_NAME}-Console ${SRC_SOURCE})
+target_link_libraries(${PROJECT_NAME}-Console PRIVATE Prism-static)

PrismRuntime/PrismRuntime/PrismRuntime.cpp

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+//
+// Created by Atdunbg on 2026/3/23.
+//
+
+#include "PrismRuntime.h"
+
+#include "Prism/Renderer/Renderer.h"
+#include "Prism/Renderer/SceneRenderer.h"
+#include "Prism/Scene/SceneSerializer.h"
+
+
+void PrismRuntime::OnAttach()
+{
+    PM_CLIENT_INFO("App init");
+
+    AppInstance = &Prism::Application::Get();
+
+    PM_CLIENT_INFO("Create Scene");
+    const Prism::Ref<Prism::Scene> newScene = Prism::Ref<Prism::Scene>::Create("runtime Scene", false, true);
+    Prism::SceneSerializer serializer(newScene);
+
+    const char* scenePath = "assets/scenes/FPS.scene";
+    PM_CLIENT_INFO("loading Scene: ", scenePath);
+    serializer.Deserialize(scenePath);
+
+    m_CurrentScene = newScene;
+
+    const glm::ivec2 windowSize = AppInstance->GetWindow().GetSize();
+    if (m_CurrentScene && windowSize.x > 0 && windowSize.y > 0)
+    {
+        Prism::SceneRenderer::SetViewportSize(windowSize.x, windowSize.y);
+        m_CurrentScene->SetViewportSize(windowSize);
+    }
+
+    PM_CLIENT_INFO("Scene Start");
+    m_CurrentScene->OnRuntimeStart();
+}
+
+void PrismRuntime::OnDetach()
+{
+    PM_CLIENT_INFO("Scene Shutdown");
+    m_CurrentScene->OnShutdown();
+}
+
+void PrismRuntime::OnUpdate(const Prism::TimeStep deltaTime)
+{
+    m_CurrentScene->OnUpdate(deltaTime);
+    m_CurrentScene->OnRenderRuntime(deltaTime);
+
+    const glm::vec2 windowSize = AppInstance->GetWindow().GetSize();
+    if (m_CurrentScene && windowSize.x > 0 && windowSize.y > 0)
+    {
+        m_CurrentScene->SetViewportSize(windowSize);
+    }
+}
+
+void PrismRuntime::OnEvent(Prism::Event& e)
+{
+}
+
+void PrismRuntime::OnImGuiRender()
+{
+}

PrismRuntime/PrismRuntime/PrismRuntime.h

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+//
+// Created by Atdunbg on 2026/3/23.
+//
+
+#ifndef PRISM_PRISMRUNTIME_H
+#define PRISM_PRISMRUNTIME_H
+#include "Prism/Core/Application.h"
+#include "Prism/Core/Layer.h"
+#include "Prism/Scene/Scene.h"
+
+
+class PrismRuntime : public Prism::Layer
+{
+public:
+    void OnAttach() override;
+    void OnDetach() override;
+
+    void OnUpdate(Prism::TimeStep deltaTime) override;
+    void OnEvent(Prism::Event& e) override;
+    void OnImGuiRender() override;
+
+
+private:
+    Prism::Ref<Prism::Scene> m_CurrentScene;
+
+    Prism::Application* AppInstance = nullptr;
+};
+
+
+#endif //PRISM_PRISMRUNTIME_H

PrismRuntime/PrismRuntime/PrismRuntimeApp.cpp

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+//
+// Created by Atdunbg on 2026/3/23.
+//
+#include "Prism.h"
+#include "PrismRuntime.h"
+#include "Prism/Core/EntryPoint.h"
+
+class PrismRuntimeApp : public Prism::Application
+{
+public:
+    explicit PrismRuntimeApp(const Prism::ApplicationProps& props)
+        : Application(props)
+    {
+    }
+
+    virtual void OnInit() override
+    {
+        PushLayer(new PrismRuntime());
+    }
+};
+
+Prism::Application* Prism::CreateApplication(const CommandArgs args)
+{
+    return new PrismRuntimeApp({"Game", 1920, 1080, args});
+}