Count opcodes

[SamWilsn]

Draft because there are some open questions about how to expose the feature.

Ready to merge, probably after #1356

What was wrong?

closes #1351

How was it fixed?

Added a counting trace implementation.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.26%. Comparing base (a7b8712) to head (32aaf7c).
⚠️ Report is 2132 commits behind head on forks/osaka.
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Additional details and impacted files

@@             Coverage Diff              @@
##           forks/osaka    #1353   +/-   ##
============================================
  Coverage        94.26%   94.26%           
============================================
  Files              583      583           
  Lines            34666    34666           
  Branches          3070     3070           
============================================
  Hits             32677    32677           
  Misses            1454     1454           
  Partials           535      535           

Flag	Coverage Δ
unittests	94.26% <ø> (ø)

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[Carsons-Eels]

Just a few minor things