Add NuGet READMEs

[jamescourtney]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6acaf8f) 97.02% compared to head (a76e900) 97.02%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #422   +/-   ##
=======================================
  Coverage   97.02%   97.02%           
=======================================
  Files         126      126           
  Lines        9701     9701           
  Branches      785      785           
=======================================
  Hits         9412     9412           
  Misses        198      198           
  Partials       91       91           

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