Organize examples by 'sphere' and access

[ronnyhdez]

As described by @alexishunzinger in ref #434:

I'm hung up on the "chapters", Examples by Data Providers and External Tutorials

1. Examples by Data Providers
   It is new (this week) guidance on the Earthdata website to minimize the use of DAAC names. As far as users are concerned, all data is in the cloud archive, centrally accessed from the Earthdata website once all DAAC websites are merged. Plus, in a year's time DAACs will restructure into thematic teams (SETs).

While the phasing out of DAACs and DAAC branding will take a while and is currently inconsistent on the Earthdata website, we can stay ahead of the change and maybe model a better way to organize these in the cookbook.

Originally posted by @alexishunzinger in #434 (comment)

Documented here:

The five spheres we anticipate Earthdata sorting us into are

Atmosphere
Biosphere
Cryosphere
Geosphere
Hydrosphere

I like the structure Access Pattern (Science Data Source) to start with. This is also leading me back to the data access cheat sheet as perhaps a map for us to use to make sure we cover all these methods in our cookbook tutorials.

What about renaming this "External Tutorials" section to something like "Archived"; then inspecting the contents to see if there is material that should be sortof 'promoted' to be in the main "tutorials" or "how-tos" sections. It seems to me like archiving is the main reason for this – to be able to reference previous material. If there's anything that is important for users to learn from currently, then it deserves to be made into a first-class tutorial/how-to in those sections?