feat(variables): improve alias variable display

[TheoGrandin74]

Summary

• Display alias variable values from the referenced base variable row instead of the embedded alias interpolation payload.
• Make alias base variable references clickable so they scroll the referenced row into view.
• Cover alias value resolution and scroll behavior in the variable list tests
• Change description component from textArea to inputText to reduce confusion between value and description field.

Screens

[codecov]

Codecov Report

❌ Patch coverage is 72.22222% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 41.97%. Comparing base (3e4cb08) to head (131e7fb).
⚠️ Report is 3 commits behind head on staging.

Files with missing lines	Patch %	Lines
...es/feature/src/lib/variable-list/variable-list.tsx	70.58%	1 Missing and 4 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #2704      +/-   ##
===========================================
- Coverage    45.40%   41.97%   -3.43%     
===========================================
  Files         1159      458     -701     
  Lines        24275    12080   -12195     
  Branches      7101     3714    -3387     
===========================================
- Hits         11022     5071    -5951     
+ Misses       11328     6049    -5279     
+ Partials      1925      960     -965     

Flag	Coverage Δ
unittests	41.97% <72.22%> (-3.43%)	⬇️

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[RemiBonnet]

LGTM 👍 thanks Théo

[RemiBonnet]

🎉 This PR is included in version 1.308.0 🎉

The release is available on GitHub release

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