moving under the hood to the user guide

[atravitz]

resolves #1198

Checklist

• Added a news entry

Developers certificate of origin

• I certify that this contribution is covered by the MIT License here and the Developer Certificate of Origin at https://developercertificate.org/.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.57%. Comparing base (e46ff92) to head (d91e3d2).
Report is 101 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1221      +/-   ##
==========================================
- Coverage   94.20%   92.57%   -1.64%     
==========================================
  Files         141      141              
  Lines       10669    10669              
==========================================
- Hits        10051     9877     -174     
- Misses        618      792     +174     

Flag	Coverage Δ
fast-tests	92.57% <ø> (?)
slow-tests	?

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[github-actions]

No API break detected ✅

[jameseastwood]

I agree this is a better place for this content. It builds renders properly: