Further update Optimization Detective documentation

[westonruter]

See #1857

[westonruter]

• Remove docs from the build.

[westonruter]

• Update introduction.md based on a new version drafted in a Google Doc.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.70%. Comparing base (42bd7a8) to head (bf4c3a7).
Report is 2 commits behind head on trunk.

Additional details and impacted files

@@           Coverage Diff           @@
##            trunk    #1869   +/-   ##
=======================================
  Coverage   66.70%   66.70%           
=======================================
  Files          88       88           
  Lines        7029     7029           
=======================================
  Hits         4689     4689           
  Misses       2340     2340           

Flag	Coverage Δ
multisite	66.70% <ø> (ø)
single	37.20% <ø> (ø)

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