Minor - Implements scene saving and loading - V12.10.0

Adds scene saving and loading functionality, using a component factory for dynamic component creation and serialization.
This allows users to save and load the state of entities, including their components and textures.

A new component factory is introduced to register and create different component types.
Each component implements serialization and deserialization methods, which are used to store and restore the component's state.

A new .ker scene file format is introduced to serialize entity data and to load it back into memory to restore the scene.

Also adds a DemoScene_V12.9.0.ker file to showcase the engine.

enginecustom/src/inc/system/ecs/components/shader_component.h

@@ -88,6 +88,28 @@ public:
         }
     }
 
+    std::string Serialize() const override
+    {
+        std::stringstream ss;
+        ss  << "ShaderComponent:"
+            << ShaderTypeToString(GetActiveShader());
+        return ss.str();
+    }
+
+    bool Deserialize(const std::string& data) override {
+        std::stringstream ss(data);
+        std::string type;
+        std::getline(ss, type, ':');
+    
+        if (type != "ShaderComponent") return false;
+    
+        std::string shaderTypeStr;
+        std::getline(ss, shaderTypeStr);
+    
+        SetActiveShader(StringToShaderType(shaderTypeStr));
+        return true;
+    }
+
 private:
     ShaderType m_activeShader;
 };