feat: contained list web-component

[2nikhiltom]

Closes #19932

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PR Checklist

As the author of this PR, before marking ready for review, confirm you:

• Reviewed every line of the diff
• Updated documentation and storybook examples
• Wrote passing tests that cover this change
• Addressed any impact on accessibility (a11y)
• Tested for cross-browser consistency
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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.13%. Comparing base (19424c0) to head (30e608b).
⚠️ Report is 72 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (19424c0) and HEAD (30e608b). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (19424c0)	HEAD (30e608b)
web-components	2	1
main-packages	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21192      +/-   ##
==========================================
- Coverage   92.60%   85.13%   -7.47%     
==========================================
  Files         515      530      +15     
  Lines       38220    40889    +2669     
  Branches     5861     6331     +470     
==========================================
- Hits        35392    34811     -581     
- Misses       2678     5918    +3240     
- Partials      150      160      +10     

Flag	Coverage Δ
main-packages	85.72% <ø> (+0.11%)	⬆️
web-components	84.80% <ø> (-12.08%)	⬇️

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