Trace mode menu item

[craigthomas]

This PR adds a trace mode menu item to the emulator. The menu item is found under a "Debugging" heading. The toggle will immediately start or stop trace output to the standard out device.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 17 lines in your changes missing coverage. Please review.

Project coverage is 57.40%. Comparing base (3d906c6) to head (45f9bfa).

Files with missing lines	Patch %	Lines
...mas/yacoco3e/listeners/SetTraceActionListener.java	0.00%	9 Missing ⚠️
...a/ca/craigthomas/yacoco3e/components/Emulator.java	0.00%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #129      +/-   ##
============================================
- Coverage     57.61%   57.40%   -0.21%     
  Complexity     1028     1028              
============================================
  Files            67       68       +1     
  Lines          4546     4562      +16     
  Branches        514      514              
============================================
  Hits           2619     2619              
- Misses         1843     1859      +16     
  Partials         84       84              

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