chore: Add vitest eslint plugin

[gethinwebster]

Description

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

How has this been tested?

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

All modified and coverable lines are covered by tests ✅

Project coverage is 95.37%. Comparing base (a5c49fe) to head (407f089).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #336      +/-   ##
==========================================
- Coverage   95.71%   95.37%   -0.35%     
==========================================
  Files          61       61              
  Lines        4321     4321              
  Branches      669      666       -3     
==========================================
- Hits         4136     4121      -15     
- Misses        185      200      +15     

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