Enhance identification of Files pane in Panes in Depth documentation

[LucyJimenez]

The first image in the Files section of the "Panes in Depth" documentation references the "Files" pane. However, since it only shows a portion of the interface, it's not easy to identify where this panel is located within the Spyder IDE. It is suggested to use a complete image of the IDE, highlighting the location of the panel with a distinctive colored box for clarity.