add generator package

[reuvenharrison]

feat: generate breaking changes messages automatically

[codecov]

Codecov Report

Attention: Patch coverage is 94.47236% with 11 lines in your changes missing coverage. Please review.

Project coverage is 86.84%. Comparing base (1719a2f) to head (2f4e0a6).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
checker/generator/tree.go	92.77%	4 Missing and 2 partials ⚠️
checker/generator/generator.go	94.11%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #604      +/-   ##
==========================================
+ Coverage   86.72%   86.84%   +0.11%     
==========================================
  Files         231      234       +3     
  Lines       13124    13323     +199     
==========================================
+ Hits        11382    11570     +188     
- Misses       1332     1340       +8     
- Partials      410      413       +3     

Flag	Coverage Δ
unittests	86.84% <94.47%> (+0.11%)	⬆️

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