Add total counts to resource index responses

[plural]

Regenerate docs as well.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.27%. Comparing base (5095576) to head (9ecaced).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #330      +/-   ##
==========================================
+ Coverage   98.24%   98.27%   +0.02%     
==========================================
  Files          79       79              
  Lines        1314     1334      +20     
  Branches      159      160       +1     
==========================================
+ Hits         1291     1311      +20     
  Misses         23       23              

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