add amip requirements to docs

[szy21]

Purpose

Closes #652

To-do

Content

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• I have read and checked the items on the review checklist.

[szy21]

@juliasloan25 @LenkaNovak Here is a draft of a brief amip description. I wonder:

1. Would you like it to be more detailed?
2. Would you like to have references?
3. For components with None, would you like them to be removed?

[juliasloan25]

This looks good to me, Zhaoyi! Now that I see the details, this might fit better in the experiments/AMIP/README.md file since that's where the AMIP driver lives and the coupler supports other setups too.

[LenkaNovak]

Looks great, thank you, @szy21 !

Shall we add more details on insolation and EDMF? I've been notionally thinking something like this, but maybe being somewhat less specific on the details that are changing is fine. :)

[juliasloan25]

to answer your questions...

Would you like it to be more detailed?
Would you like to have references?
For components with None, would you like them to be removed?

1. I think the detail level is good, but I'm less familiar with the physics so will default to you two on that
2. References would be nice if possible, but if we don't have them it's okay too
3. To me it seems like it's good to keep "none" for components we don't have so it's clear what is and isn't included

[szy21]

hmm for some reason my branch is updated but this PR is not. I'll try close and reopen.