Add MVP of virtual machine tracer

[nekevss]

This pull request implements a new VirtualMachineTracer trait that emits VirtualMachineEvents rather than immediately printing the values to stdout.

This should allow better customization of event handling.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	52,963	52,963	0
Passed	49,687	49,666	-21
Ignored	2,262	2,284	+22
Failed	1,014	1,013	-1
Panics	0	0	0
Conformance	93.81%	93.77%	-0.04%

Tested main commit: b3d820369072123ded8defc927405b99b9012648
Tested PR commit: 01e41cd03fa72e78cc7a00ec3bcf4e67e5ca357d
Compare commits: b3d8203...01e41cd

[codecov]

Codecov Report

❌ Patch coverage is 3.77358% with 51 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.66%. Comparing base (6ddc2b4) to head (01e41cd).
⚠️ Report is 775 commits behind head on main.

Files with missing lines	Patch %	Lines
core/engine/src/vm/trace.rs	0.00%	27 Missing ⚠️
core/engine/src/vm/mod.rs	7.69%	24 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #4931       +/-   ##
===========================================
+ Coverage   47.24%   57.66%   +10.41%     
===========================================
  Files         476      557       +81     
  Lines       46892    60964    +14072     
===========================================
+ Hits        22154    35152    +12998     
- Misses      24738    25812     +1074     

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