Initialize a first menu without rendering it for the moment
* creation of toggle function between menu and game
* creation of the interface State
* first implementation of input for the key_up and key_down
* creation of GuiComponent class
* linking the creation of a GuiComponent and the IND_Entity2DManager of the MenuManager
Display a button and handle input on it
* creation of the button class
* suppression of IND_Entity2DManager in RenderEntity class, where it was not supposed to be
* GuiComponent is responsible for IND_SurfaceManager and IND_ImageManager
* display a button with a surface (image)
* adding mouse input in InputManager
* handle input of the button by mouse clic