[ADD] added base for loading scene

src/scenes/loading_Scene.h

@@ -0,0 +1,63 @@
+#pragma once
+#pragma once
+#include "scene.h"
+#include "../gui/gui_element.h"
+#include "../shaders/gui_shader.h"
+
+namespace scene
+{
+	extern GLFWwindow* window;
+	
+
+	class Loading_Scene : public scene::Scene
+	{
+	private:
+		//return_value is an enum that is necessary for the scene switching. Whenever this changes, the scene will change to a different scene.
+		scene::Scenes return_value = scene::Scenes::LOADING;
+		shaders::GuiShader* gui_shader;
+
+
+	public:
+		/**
+		 * @brief Constructor of the class Startup_Scene
+		 *
+		 */
+		Loading_Scene();
+
+		~Loading_Scene();
+		
+		/**
+		 * @brief
+		 *
+		 * @param window
+		 * @return
+		 */
+		Scenes start(GLFWwindow* window) override;
+
+		/**
+		 * @brief
+		 *
+		 */
+		void render() override;
+
+		/**
+		 * @brief This method updates all the components on the window
+		 *
+		 * @param window Window it updates
+		 */
+		void update(GLFWwindow* window) override;
+
+		/**
+		 * @brief Listener for key events
+		 *
+		 * @param window Window it listens to for key events
+		 * @param key Key of event that is activated
+		 * @param scancode Code of Key
+		 * @param action
+		 * @param mods
+		 */
+		void onKey(GLFWwindow* window, int key, int scancode, int action, int mods) override;
+	};
+}
+
+