feat: add report template

[karlderkaefer]

• refactor transformer processor to use chain of responsibility pattern for better extensibility
• add more tests to ensure all cases are tested
• add custom report template which allows user to provide on templates
• add resource count summary before details

closes #126

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (e9b0b04) 75.91% compared to head (ed3ba9a) 77.49%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
transform/template.go	82.45%	8 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #127      +/-   ##
==========================================
+ Coverage   75.91%   77.49%   +1.58%     
==========================================
  Files           7        8       +1     
  Lines         739      822      +83     
==========================================
+ Hits          561      637      +76     
- Misses        131      137       +6     
- Partials       47       48       +1     

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[karlderkaefer]

🎉 This PR is included in version 2.9.0 🎉

The release is available on GitHub release

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