feat: add ESLint v9 compatibility layer

[MichaelDeBoey]

CC/ @JoshuaKGoldberg

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.35%. Comparing base (867f770) to head (9e8e0e8).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #206      +/-   ##
==========================================
+ Coverage   97.27%   97.35%   +0.08%     
==========================================
  Files          40       41       +1     
  Lines         403      416      +13     
==========================================
+ Hits          392      405      +13     
  Misses         11       11              

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[voxpelli]

Needs explanation, context, to be put into relation to #183 and eg justify additions and changes when this is a plugin that we should very much move away from (or justify to keep, see #183)