chore: cleanup inheritance structure

[lenkan]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 89.07850% with 32 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.26%. Comparing base (ba2986a) to head (557df7a).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/frame.ts	80.19%	20 Missing ⚠️
src/genus.ts	84.44%	7 Missing ⚠️
src/matter.ts	91.66%	4 Missing ⚠️
src/indexer.ts	97.91%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #26      +/-   ##
==========================================
+ Coverage   91.06%   91.26%   +0.20%     
==========================================
  Files          17       17              
  Lines        2450     2531      +81     
  Branches      289      292       +3     
==========================================
+ Hits         2231     2310      +79     
- Misses        219      221       +2     

Flag	Coverage Δ
unittests	91.26% <89.07%> (+0.20%)	⬆️

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