Baked-in support for overlay plots (skewT/hodo maps)

[jthielen]

What should we add?

This came up again in today's telecon, and while I thought we had an issue created for this, I saw that was not the case!

As in https://github.com/jsillin/SoundingMaps and https://github.com/nixoncameronj/HodoMap, it would be great to have built-in support in MetPy for "overlay plots" (where a grid of vertical profile plots such as skewTs and hodographs is overlaid over a map), perhaps through the declarative interface

See also, #1706, #1752, #1709

Reference

• https://github.com/jsillin/SoundingMaps
• https://github.com/nixoncameronj/HodoMap