refactor: Convert Cell stories to csf format

[brianacnguyen]

Description

• Updated Cell Base's const, stories, and test files.
• Updated Cell Display's const, stories, and test files.
• Updated Cell MultiSelect's const, stories, and test files.
• Updated Cell Select's const, stories, and test files.
• Updated Cell's const, stories, and test files.
• Updated CellVariants to CellVariant

Screenshots/Recordings

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've clearly explained:
  • What problem this PR is solving.
  • How this problem was solved.
  • How reviewers can test my changes.
• I’ve indicated what issue this PR is linked to: Fixes #???
• I’ve included tests if applicable.
• I’ve documented any added code.
• I’ve applied the right labels on the PR (see labeling guidelines).
• I’ve properly set the pull request status:
  • In case it's not yet "ready for review", I've set it to "draft".
  • In case it's "ready for review", I've changed it from "draft" to "non-draft".

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[georgewrmarshall]

LGTM! Some non blocking comments

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

75.0% Coverage
0.0% Duplication

[codecov-commenter]

Codecov Report

Attention: 14 lines in your changes are missing coverage. Please review.

Comparison is base (4fb2b2b) 34.85% compared to head (45f112b) 34.95%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7373      +/-   ##
==========================================
+ Coverage   34.85%   34.95%   +0.10%     
==========================================
  Files        1028     1031       +3     
  Lines       27424    27410      -14     
  Branches     2267     2254      -13     
==========================================
+ Hits         9558     9581      +23     
+ Misses      17356    17319      -37     
  Partials      510      510              

Files	Coverage Δ
...vatars/Avatar/foundation/AvatarBase/AvatarBase.tsx	75.00% <100.00%> (ø)
...rs/Avatar/variants/AvatarAccount/AvatarAccount.tsx	75.00% <100.00%> (ø)
...nt-library/components/Cells/Cell/Cell.constants.ts	100.00% <100.00%> (ø)
...lls/Cell/foundation/CellBase/CellBase.constants.ts	100.00% <100.00%> (ø)
...onents/Cells/Cell/foundation/CellBase/CellBase.tsx	100.00% <100.00%> (ø)
...Cell/variants/CellDisplay/CellDisplay.constants.ts	100.00% <100.00%> (ø)
...ts/Cells/Cell/variants/CellDisplay/CellDisplay.tsx	100.00% <100.00%> (ø)
...iants/CellMultiSelect/CellMultiSelect.constants.ts	100.00% <100.00%> (ø)
.../Cell/variants/CellMultiSelect/CellMultiSelect.tsx	100.00% <ø> (ø)
...s/Cell/variants/CellSelect/CellSelect.constants.ts	100.00% <100.00%> (ø)
... and 12 more

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