Improve readability of CLI trace output

[sahanaxzy]

Description

The trace output in the CLI was difficult to read when the stack grew large — table rows would overflow the terminal width, making everything look messy.

solves #5102

Changes

Group consecutive identical values: Repeated stack entries like undefined, undefined, undefined are now displayed as undefined (x3), reducing visual noise

Truncate long values: Individual stack values are capped at 18 characters to prevent single entries from blowing out the table layout

Cap total stack display width: The stack column is bounded so lines don't overflow the terminal, with a .. (N total) indicator showing the full stack depth

Empty stack handling: Empty stacks now display [ <empty> ] instead of [ ]

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	52,963	52,963	0
Passed	50,073	50,073	0
Ignored	2,072	2,072	0
Failed	818	818	0
Panics	0	0	0
Conformance	94.54%	94.54%	0.00%

Tested main commit: daf86d30277a5c1fb353825347f75c1d83516905
Tested PR commit: 69fd0d726d5972249cab0fe5545b741d912271a7
Compare commits: daf86d3...69fd0d7

[codecov]

Codecov Report

❌ Patch coverage is 0% with 53 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.77%. Comparing base (6ddc2b4) to head (a48942a).
⚠️ Report is 918 commits behind head on main.

Files with missing lines	Patch %	Lines
core/engine/src/vm/mod.rs	0.00%	53 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5104       +/-   ##
===========================================
+ Coverage   47.24%   59.77%   +12.53%     
===========================================
  Files         476      589      +113     
  Lines       46892    63448    +16556     
===========================================
+ Hits        22154    37929    +15775     
- Misses      24738    25519      +781     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[jedel1043]

One suggestion that I always wanted to do was to display undefined -> und, function -> func, object -> obj, etc. The logic for this is that folks that are tracing through bytecode usually already know the internals of JS engines, so offering a more brief representation of all values would make it easier to show more state about the VM at once

[sahanaxzy]

Thanks for the suggestion... I have updated
the stack output is lot more prettier now

[Monti-27]

A couple of bugs stood out in the new stack formatter.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	52,963	52,963	0
Passed	50,732	50,732	0
Ignored	1,426	1,426	0
Failed	805	805	0
Panics	0	0	0
Conformance	95.79%	95.79%	0.00%

Tested main commit: 8fcbfcbb8b9e70fe878d28376a6496eaa57a70d7
Tested PR commit: a48942a7b9178b4d8d5643e622ff07b3b023a341
Compare commits: 8fcbfcb...a48942a