Repo cleanup

[mchmarny]

• Slims Node example image
• Generalize package type (implemented in trivy and grype)
• Parameterized tools/gen-reports script to gen simplify generating sample data for new image types
• Lower the log verbosity on duplicate/created notes/occurrences
• Moved sample data into examples directory (root was getting too crowded)

[codecov-commenter]

Codecov Report

Patch coverage: 10.87% and project coverage change: +0.90 🎉

Comparison is base (f6cdbfd) 72.83% compared to head (ad1b490) 73.73%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #46      +/-   ##
==========================================
+ Coverage   72.83%   73.73%   +0.90%     
==========================================
  Files           7        8       +1     
  Lines         714      708       -6     
==========================================
+ Hits          520      522       +2     
+ Misses        177      169       -8     
  Partials       17       17              

Flag	Coverage Δ
unittests	73.73% <10.87%> (+0.90%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/vul/delete.go	0.00% <0.00%> (ø)
pkg/vul/import.go	9.10% <0.00%> (+3.21%)	⬆️
pkg/convert/grype/grype.go	88.47% <100.00%> (ø)
pkg/convert/snyk/snyk.go	93.92% <100.00%> (+0.05%)	⬆️
pkg/convert/trivy/trivy.go	94.83% <100.00%> (+1.12%)	⬆️

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