Add read the docs configuration

[DanielNoord]

References #2417

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.15%. Comparing base (65d8feb) to head (1778486).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2504   +/-   ##
=======================================
  Coverage   99.15%   99.15%           
=======================================
  Files          41       41           
  Lines        3068     3068           
  Branches      665      665           
=======================================
  Hits         3042     3042           
  Misses         14       14           
  Partials       12       12           

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