feat: support finding non-namespaced resources stuck by finalizers

[Yuni-sa]

What this PR does / why we need it?

Currently we only check for namespaced resources with finalizers.

PR Checklist

• This PR adds K8s exceptions (false positives)
• This PR adds new code
• This PR includes tests for new/existing code
• This PR adds docs

GitHub Issue

Closes #418

Notes for your reviewers

also updated output format.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 43.52%. Comparing base (5cfae3f) to head (680266d).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/kor/finalizers.go	0.00%	11 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #419      +/-   ##
==========================================
- Coverage   43.61%   43.52%   -0.09%     
==========================================
  Files          63       65       +2     
  Lines        4074     4204     +130     
==========================================
+ Hits         1777     1830      +53     
- Misses       2049     2116      +67     
- Partials      248      258      +10     

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