yaml and python options to define regions

[wwieder]

I pulled the regions and lat-lon boundaries from the .nc file used by the current land diagnostics package to address #376 This was done:

• manually (maybe introducing errors) and
• naively (perhaps without the right formatting)

@megandevlan & @samsrabin please see if this yaml file can be read in and used as expected in the regional subsetting you're working on.

Note: there are regions that span 0 longitude. Not sure what the best way to handle this is?
I've also provided lats -180 to 180, as I think this is what uxarray needs, but would have to be modified for xarray datasets that are 0-360.

Finally, I tried using copilot to see if the yaml file was formatted correctly to create a python dictionary and it just created the python dictionary for me! I've included that here too, but both files don't need to be merged. Dealers choice on which you prefer

[samsrabin]

I ended up getting distracted from regions and working on #382 instead, so I'll let @megandevlan handle this. I vote for the actual YAML file though.

[megandevlan]

I vote for the actual yml file as well, though I don't know that I have the bandwidth to test things out today. I can get to this early next week though!

[wwieder]

OK, I'll merge this in so you have access to the file when you're ready @megandevlan