Add GDB printer

[mborland]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.57%. Comparing base (90386cc) to head (8c9b1a7).
⚠️ Report is 4 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #283   +/-   ##
========================================
  Coverage    99.57%   99.57%           
========================================
  Files           54       54           
  Lines         4921     4921           
  Branches      1429     1429           
========================================
  Hits          4900     4900           
  Misses          21       21           

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