feat: Add flexible layout for attribute editor

[gethinwebster]

Description

Re-run of #3123 with an additional fix for a regression found in visual tests (missing individual row labels in certain layouts)

Related links, issue #, if available: n/a

How has this been tested?

Tested locally

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

Attention: Patch coverage is 98.92473% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.42%. Comparing base (372abbd) to head (d4d198f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/attribute-editor/utils.ts	96.87%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3212   +/-   ##
=======================================
  Coverage   96.42%   96.42%           
=======================================
  Files         787      789    +2     
  Lines       22191    22251   +60     
  Branches     7555     7577   +22     
=======================================
+ Hits        21398    21456   +58     
- Misses        741      743    +2     
  Partials       52       52           

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