Connect layers implementation with graph model

[AndreySorokin7]

Closes #33

[codecov]

Codecov Report

Attention: Patch coverage is 92.10526% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 88.34%. Comparing base (f2d2177) to head (819f0de).
Report is 5 commits behind head on main.

Files	Patch %	Lines
include/graph/graph.hpp	95.00%	0 Missing and 1 partial ⚠️
include/layers/OutputLayer.hpp	0.00%	1 Missing ⚠️
src/layers/FCLayer.cpp	85.71%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #130      +/-   ##
==========================================
- Coverage   88.74%   88.34%   -0.40%     
==========================================
  Files          18       18              
  Lines         693      695       +2     
  Branches      325      333       +8     
==========================================
- Hits          615      614       -1     
- Misses         50       51       +1     
- Partials       28       30       +2     

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[github-actions]

clang-tidy made some suggestions

[github-actions]

clang-tidy made some suggestions