refactor(icons): move componets/icon to elements/icons

[makafsal]

Closes #17936

Moved components/icon to elements/icons to sync with React

Changelog

New

• A new Elements section in Storybook

Changed

• Moved components/icon stories to elements/icons
• Renamed icon.* files to icons.*

Removed

• Stories components/icon

Testing / Reviewing

1. Direct to web-components storybook
2. Scroll down in the left sidebar to find the new Elements section
3. Can find the Icons stories there

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.17%. Comparing base (9217609) to head (30b8212).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #18316   +/-   ##
=======================================
  Coverage   84.17%   84.17%           
=======================================
  Files         408      408           
  Lines       14435    14435           
  Branches     4690     4690           
=======================================
  Hits        12150    12150           
  Misses       2120     2120           
  Partials      165      165           

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[2nikhiltom]

LGTM