tried to add assimp (spoilers, it did not go well, so hey! now we have separate fiels now.)

src/ProjectManager.h

@@ -0,0 +1,62 @@
+#pragma once
+
+#include "Common.h"
+#include "SceneObject.h"
+
+struct RecentProject {
+    std::string name;
+    std::string path;
+    std::string lastOpened;
+};
+
+class Project {
+public:
+    std::string name;
+    fs::path projectPath;
+    fs::path scenesPath;
+    fs::path assetsPath;
+    fs::path scriptsPath;
+    std::string currentSceneName;
+    bool isLoaded = false;
+    bool hasUnsavedChanges = false;
+
+    Project() = default;
+    Project(const std::string& projectName, const fs::path& basePath);
+
+    bool create();
+    bool load(const fs::path& projectFilePath);
+    void saveProjectFile() const;
+    std::vector<std::string> getSceneList() const;
+    fs::path getSceneFilePath(const std::string& sceneName) const;
+};
+
+class ProjectManager {
+public:
+    std::vector<RecentProject> recentProjects;
+    fs::path appDataPath;
+    char newProjectName[128] = "";
+    char newProjectLocation[512] = "";
+    char openProjectPath[512] = "";
+    bool showNewProjectDialog = false;
+    bool showOpenProjectDialog = false;
+    std::string errorMessage;
+    Project currentProject;
+
+    ProjectManager();
+
+    void loadRecentProjects();
+    void saveRecentProjects();
+    void addToRecentProjects(const std::string& name, const std::string& path);
+    bool loadProject(const std::string& path);
+};
+
+class SceneSerializer {
+public:
+    static bool saveScene(const fs::path& filePath,
+                         const std::vector<SceneObject>& objects,
+                         int nextId);
+
+    static bool loadScene(const fs::path& filePath,
+                         std::vector<SceneObject>& objects,
+                         int& nextId);
+};