refactor: Move Polaris package under plugin

[danielpacak]

No description provided.

[codecov]

Codecov Report

Merging #419 (21d2a6d) into main (3892722) will decrease coverage by 5.86%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #419      +/-   ##
==========================================
- Coverage   67.45%   61.59%   -5.87%     
==========================================
  Files          59       48      -11     
  Lines        3371     2911     -460     
==========================================
- Hits         2274     1793     -481     
- Misses        817      860      +43     
+ Partials      280      258      -22     

Impacted Files	Coverage Δ
pkg/cmd/scan_configaudit.go	55.00% <100.00%> (ø)
pkg/cmd/scan_vulnerabilities.go	68.25% <100.00%> (ø)
pkg/operator/operator.go	58.41% <100.00%> (ø)
pkg/vulnerabilityreport/sort.go	0.00% <0.00%> (-71.43%)	⬇️
pkg/kube/object.go	34.37% <0.00%> (-28.13%)	⬇️
pkg/trivy/plugin.go	47.90% <0.00%> (-26.58%)	⬇️
pkg/kubehunter/writer.go	56.52% <0.00%> (-26.09%)	⬇️
pkg/kube/secrets.go	21.11% <0.00%> (-24.45%)	⬇️
pkg/kubebench/io.go	69.56% <0.00%> (-21.74%)	⬇️
pkg/configauditreport/io.go	40.47% <0.00%> (-16.67%)	⬇️
... and 17 more

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