Update the Introduction of Tutorials section of the Maps guides for 2.4

[jyaistMap]

Update the Maps -> Tutorials -> Introduction guide to reflect 2.4

• added a section to display Map Service Layers
• updated introductory paragraph to reflect 2.4 modules and names:
  • @jtroe @nanaeaubry @achapkowski Can you please read through that paragraph and let me know if it should be rewritten?
• updated the Object Model Diagram to replace MapView Class Diagram with what I could find:
  • @jtroe @nanaeaubry @achapkowski - Please look at this - is this worth adding? Is there a better way to create an Object Model Diagram for Python classes? I don't know what software was used to create the current ones.

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[nanaeaubry]

@jyaistMap

This line is confusing: you should say the arcgis package rather than the GIS object. Or if you want to keep the GIS object then say something about how the arcgis.map.Map class is accessed through the map method in the GIS object. I know you mention the map method in the next sentence after but I think this can be clearer.

The GIS object includes a map widget (implemented as the arcgis.map.Map class) for displaying geographic locations, and visualizing GIS content and analysis results. The Map class creates a mapping widget utilizing the [ArcGIS Maps SDK for Javascript](https://developers.arcgis.com/javascript/latest/) powered by the modern backend architecture and processing of [JupyterLab 4](https://blog.jupyter.org/jupyterlab-4-0-is-here-388d05e03442) and [Notebook 7](https://blog.jupyter.org/announcing-jupyter-notebook-7-8d6d66126dcf).